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UltravioletPhotography

Lens Field Test [M42-mount, Infinity, Vis/IR/UV]


Andrea B.

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Purpose of Test: To verify that each lens can shoot "at infinity" in Vis/IR/UV and can record in those wavelengths.

 

Subject: Landscape of Trees and Vines

Target: Each lens was focused way out there on the trees. "-)

Location: Huber Woods Park, Middletown, New Jersey, USA

Date: 17 September 2014

Camera: Pentax K5-broadband

Raw Converter/Editor: Photo Ninja

TIFF to JPG Converter: Photo Mechanic

 

Visible White Balance: Visible light profiles were made for each lens using the Color Checker Passport profiling grid in Photo Ninja. These profiles correct white balance.

 

IR White Balance: The Photo Ninja Color Correction dropper was dragged over the photo diagonal from lower left to upper right to provide a kind of average white balance over the scene. This is a bit of a primitive white balancing method, but because the B+W 093 IR-Pass filter produces an almost monochrome photograph so the method suffices.

 

UV White Balance: UV profiles were made for each lens by photographing Labsphere reflective standards. After making the white balance correction on the white standard, the visible light profile for that lens was applied.

 

Post #5 below has an illustration of the Visible and UV white balance for one of the tested lenses.

 

Visible Edits: Profiled WB as described above. Exposure and highlights sliders adjusted as needed. Default sharpening and default colour noise removal. Default Neutral colour setting. Detail slider = 15. No local edits.

 

IR Edits: Average WB as described above. Exposure and highlights sliders adjusted as needed. Default sharpening and default colour noise removal. Default Neutral colour setting. Detail slider = 20. No local edits.

 

UV Edits: Profiled WB as described above. Exposure and highlights sliders adjusted as needed. Default sharpening and default colour noise removal. Default Neutral colour setting. Detail slider = 15. No local edits.

 

Note: I worked hard to get good exposures so the exposure adjustments mentioned above were quite minimal.

 

UV Capability: As always, remember that light varies during a shoot, so please do not overinterpret the speeds given here except to note that the Ultra-Achromatic-Takumar, a dedicated UVIR-lens which is fully corrected in UV/Visible/IR wavelengths, gives the fastest exposure time in this test.

Although I noted that two of the 35mm lenses were slightly faster in UV than the remaining lenses (UAT excepted), it is only by 1/3 of a stop. I'm not sure this is a meaningful margin.

The saturation of the converted UV photo was tripled to show center/edge differences which are a common occurence in landscapes due to vignetting, light fall-off and other factors.

All UV photos were made at f/11 and ISO 400.

 

The 35s

Asahi Opt. Co. 35/4.0 Takumar = 1" (ties for fastest 35, 2nd fastest overall, but not by much!!)

A.Schacht Ulm 35/3.5 R Travegon = 2"

Isco-Göttingen 35/3.5 Westron = 2"

Kyoei Optical Co. 35/3.5 W.Acall = 1.3"

Meyer-Optik Görlitz 35/3.5 Primagon = 1.3"

Novoflex 35/3.5 Noflexar = 1" (ties for fastest 35, 2nd fastest overall, but not by much!!)

 

The 50s

Asahi-Kogaku 50/3.5 Takumar = 1.3"

Carl Zeiss Jena 50/3.5 Tessar = 2.5"

E.Ludwig 50/2.9 Meritar = 2"

 

The Longs

Asahi 85/3.5 Quartz Takumar = 1.3" (so much for the idea that quartz gives a speedy UV lens)

Asahi 85/4.5 Ultra-Achromatic-Takumar = 1/1.7" (da winnah !!)

Asahi 135/3.5 Takumar = 1.6"

 

************************************************************************

 

All photos may be clicked for a larger view.

 

Lens: Asahi Opt. Co. 35mm f/4.0 Takumar #1994XX

Mount: M42

FFD: 45.46mm

UV: ~345nm

Filter: 46mm

 

Visible Light [f/11 for 1/60" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

asahi35&4.0Tak_LscapeVisSun_091714huberWoodsPkMtNJ_134056pn.jpg

 

Infrared Light [f/11 for 1/80" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

asahi35&4.0Tak_Lscape093IRSun_091714huberWoodsPkMtNJ_134733pn.jpg

 

Ultraviolet Light [f/11 for 1" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

asahi35&4.0Tak_LscapeUVBaadSun_091714huberWoodsPkMtNJ_134540pn.jpg

 

Ultraviolet Light [preceding photo over-saturated to show center/edge differences]

asahi35&4.0Tak_LscapeUVBaadSun_091714huberWoodsPkMtNJ_134540pnHiSat.jpg

 

 

Lens: A.Schacht Ulm 35mm f/3.5 R Travegon #1542XX

Mount: M42

FFD: 45.46mm

UV: ?

Filter: 49mm

 

Visible Light [f/11 for 1/80" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

aShachtUlm35&3.5Travegon_LscapeVisSun_091714huberWoodsPkMtNJ_135858pn.jpg

 

Infrared Light [f/11 for 1/125" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

aShachtUlm35&3.5Travegon_Lscape093IRSun_091714huberWoodsPkMtNJ_140043pn.jpg

 

Ultraviolet Light [f/11 for 2" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

aShachtUlm35&3.5Travegon_LscapeUVBaadSun_091714huberWoodsPkMtNJ_140406pn.jpg

 

Ultraviolet Light [preceding photo over-saturated to show center/edge differences]

aShachtUlm35&3.5Travegon_LscapeUVBaadSun_091714huberWoodsPkMtNJ_140406pnHiSat.jpg

 

 

Lens: Isco-Göttingen 35mm f/3.5 Westron #6823XX

Mount: M42

FFD: 45.46mm

UV: ?

Filter: 46mm

 

Visible Light [f/11 for 1/80" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

iscoGottingen35&3.5Westron_LscapeVisSun_091714huberWoodsPkMtNJ_140845pn.jpg

 

Infrared Light [f/11 for 1/80" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

iscoGottingen35&3.5Westron_Lscape093IRSun_091714huberWoodsPkMtNJ_141009pn.jpg

 

Ultraviolet Light [f/11 for 2" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

iscoGottingen35&3.5Westron_LscapeUVBaadSun_091714huberWoodsPkMtNJ_141119pn.jpg

 

Ultraviolet Light [preceding photo over-saturated to show center/edge differences]

iscoGottingen35&3.5Westron_LscapeUVBaadSun_091714huberWoodsPkMtNJ_141119pnHiSat.jpg

 

Published: 18 Sept 2014

Updated: 24 Sept 2014

Lens name correction. "W.Acall ... Kyoei" changed to "Kyoei Optical Co. ... W. Acall".

Link to comment

All photos may be clicked for a larger view.

 

Lens: Meyer-Optik Görlitz 35mm f/3.5 Primagon #28375XX

Mount: M42

FFD: 45.46mm

UV: ~345nm

Filter: 46mm

 

Visible Light [f/11 for 1/60" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

meyerOptik35&3.5Primagon_LscapeVisSun_091714huberWoodsPkMtNJ_142125pn.jpg

 

Infrared Light [f/11 for 1/100" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

meyerOptik35&3.5Primagon_Lscape093IRSun_091714huberWoodsPkMtNJ_142217pn.jpg

 

Ultraviolet Light [f/11 for 1.3" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

meyerOptik35&3.5Primagon_LscapeUVBaadSun_091714huberWoodsPkMtNJ_142427pn.jpg

 

Ultraviolet Light [preceding photo over-saturated to show center/edge differences]

meyerOptik35&3.5Primagon_LscapeUVBaadSun_091714huberWoodsPkMtNJ_142427pnHiSat.jpg

 

 

Lens: Novoflex 35mm f/3.5 Noflexar #3595XX

Mount: M42

FFD: 45.46mm

UV: ~330nm

Filter: 49mm

 

Visible Light [f/11 for 1/100" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

novoflex35&3.5Noflexar_LscapeVisSun_091714huberWoodsPkMtNJ_141451pn.jpg

 

Infrared Light [f/11 for 1/100" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

novoflex35&3.5Noflexar_Lscape093IRSun_091714huberWoodsPkMtNJ_141656pn.jpg

 

Ultraviolet Light [f/11 for 1" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

novoflex35&3.5Noflexar_LscapeUVBaadSun_091714huberWoodsPkMtNJ_141848pn.jpg

 

Ultraviolet Light [preceding photo over-saturated to show center/edge differences]

novoflex35&3.5Noflexar_LscapeUVBaadSun_091714huberWoodsPkMtNJ_141848pnHiSat.jpg

 

 

Lens: Kyoei Optical Co. 35mm f/3.5 W. Acall #358XX

The letter 'W' supposedly stands for 'Wide'.

Mount: M42

FFD: 45.46mm

UV: ?

Filter: 46mm

 

Visible Light [f/11 for 1/60" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

wAcall35&3.5Kyoei_LscapeVisSun_091714huberWoodsPkMtNJ_135154pn.jpg

 

Infrared Light [f/11 for 1/80" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

wAcall35&3.5Kyoei_Lscape093IRSun_091714huberWoodsPkMtNJ_135322pn.jpg

 

Ultraviolet Light [f/11 for 1.3" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

wAcall35&3.5Kyoei_LscapeUVBaadSun_091714huberWoodsPkMtNJ_135523pn.jpg

 

Ultraviolet Light [preceding photo over-saturated to show center/edge differences]

wAcall35&3.5Kyoei_LscapeUVBaadSun_091714huberWoodsPkMtNJ_135523pnHiSat.jpg

 

 

Published: 18 Sept 2014

Updated: 24 Sept 2014

Lens name correction. "W.Acall ... Kyoei" changed to "Kyoei Optical Co. ... W. Acall".

Link to comment

All photos may be clicked for a larger view.

 

Lens: Asahi-Kogaku 50mm f/3.5 Takumar #905XX

Mount: M37

Adapter: M37/M42

FFD: 45.46mm

UV: ?

Filter: The front of the lens has no filter threads, so filters were held in place while shooting.

 

Visible Light [f/11 for 1/200" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

asahiKogaku50&3.5Takumar_LscapeVisSun_091714huberWoodsPkMtNJ_145455pn.jpg

 

Infrared Light [f/11 for 1/250" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

asahiKogaku50&3.5Takumar_Lscape093IRSun_091714huberWoodsPkMtNJ_145624pn.jpg

 

Ultraviolet Light [f/11 for 1.3" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

asahiKogaku50&3.5Takumar_LscapeUVBaadSun_091714huberWoodsPkMtNJ_150215pn.jpg

 

Ultraviolet Light [preceding photo over-saturated to show center/edge differences]

asahiKogaku50&3.5Takumar_LscapeUVBaadSun_091714huberWoodsPkMtNJ_150215pnHiSat.jpg

 

 

Lens: Carl Zeiss Jena 50mm f/3.5 Tessar #36390XX (has a red mark)

Mount: M42

FFD: 45.46mm

UV: ?

Filter: 40.5mm

 

Visible Light [f/11 for 1/60" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

carlZeissJena50&3.5Tessar_LscapeVisSun_091714huberWoodsPkMtNJ_143945pn.jpg

 

Infrared Light [f/11 for 1/80" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

carlZeissJena50&3.5Tessar_Lscape093IRSun_091714huberWoodsPkMtNJ_144108pn.jpg

 

Ultraviolet Light [f/11 for 2.5" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

carlZeissJena50&3.5Tessar_LscapeUVBaadSun_091714huberWoodsPkMtNJ_145054pn.jpg

 

Ultraviolet Light [preceding photo over-saturated to show center/edge differences]

carlZeissJena50&3.5Tessar_LscapeUVBaadSun_091714huberWoodsPkMtNJ_145054pnHiSat.jpg

 

 

Lens: E.Ludwig 50mm f/2.9 Meritar #13919XX

Mount: M42

FFD: 45.46mm

UV: ?

Filter: 35.5mm

 

Visible Light [f/11 for 1/80" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

eLudwig50&2.9Meritar_LscapeVisSun_091714huberWoodsPkMtNJ_143207pn.jpg

 

Infrared Light [f/11 for 1/60" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

eLudwig50&2.9Meritar_Lscape093IRSun_091714huberWoodsPkMtNJ_143413pn.jpg

 

Ultraviolet Light [f/11 for 2" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

eLudwig50&2.9Meritar_LscapeUVBaadSun_091714huberWoodsPkMtNJ_143630pn.jpg

 

Ultraviolet Light [preceding photo over-saturated to show center/edge differences]

eLudwig50&2.9Meritar_LscapeUVBaadSun_091714huberWoodsPkMtNJ_143630pnHiSat.jpg

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All photos may be clicked for a larger view.

 

Lens: Asahi Opt. Co. 85mm f/3.5 Quartz-Takumar #949XXX

This is a bellows lens which was used on an M42 helicoid. The lens exhibits a great deal of chromatic abberation in the Visible and UV photos. The lens is meant to be used with narrowband filters.

Mount: M42

FFD: 45.46mm

UV: 200mm from manufacturer's specifications

Filter: 49mm

 

Visible Light [f/11 for 1/25" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

asahi85&3.5QuartzTakumar_LscapeVisSun_091714huberWoodsPkMtNJ_151034pn.jpg

 

Infrared Light [f/11 for 1/20" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

asahi85&3.5QuartzTakumar_Lscape093IRSun_091714huberWoodsPkMtNJ_151148pn.jpg

 

Ultraviolet Light [f/11 for 1.3" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

Serious chromatic abberation under a broadband UV-pass filter is seen in this UV photo as a kind of soft glow.

asahi85&3.5QuartzTakumar_LscapeUVBaadSun_091714huberWoodsPkMtNJ_151326pn.jpg

 

Ultraviolet Light [preceding photo over-saturated to show center/edge differences]

asahi85&3.5QuartzTakumar_LscapeUVBaadSun_091714huberWoodsPkMtNJ_151326pnHiSat.jpg

 

 

Lens: Asahi Opt. Co. 85mm f/4.5 Ultra-Achromatic-Takumar #3605XXX

Mount: M42

FFD: 45.46mm

UV: 220nm from manufacturer's specifications

Filter: 49mm

 

Visible Light [f/11 for 1/125" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

The color was profiled, but this seems to have a slight blue or cyan cast to me.

I will investigate this to see if I did something wrong during the profiling.

asahi85&4.5UAT_LscapeVisSun_091714huberWoodsPkMtNJ_151752pn.jpg

 

Infrared Light [f/11 for 1/125" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

asahi85&4.5UAT_Lscape093IRSun_091714huberWoodsPkMtNJ_152015pn.jpg

 

Ultraviolet Light [f/11 for 1/6" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

asahi85&4.5UAT_LscapeUVBaadSun_091714huberWoodsPkMtNJ_152112pn.jpg

 

Ultraviolet Light [preceding photo over-saturated to show center/edge differences]

asahi85&4.5UAT_LscapeUVBaadSun_091714huberWoodsPkMtNJ_152112pnHiSat.jpg

 

Lens: Asahi Opt. Co. 135mm f/3.5 Takumar #3972XX

Mount: M42

FFD: 45.46mm

UV: ?

Filter: 46mm

 

Visible Light [f/11 for 1/100" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

asahi135&3.5Takumar_LscapeVisSun_091714huberWoodsPkMtNJ_152421pn.jpg

 

Infrared Light [f/11 for 1/125" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

asahi135&3.5Takumar_Lscape093IRSun_091714huberWoodsPkMtNJ_152510pn.jpg

 

Ultraviolet Light [f/11 for 1.6" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

The focusing error in this UV photo is entirely my own. The 135/3.5 Takumar is a nicely sharp lens as can been seen in the Visible and IR photos above. I was attempting to block the M42/K-mount adapter light leak and joggled the rig, not realizing this until later.

asahi135&3.5Takumar_LscapeUVBaadSun_091714huberWoodsPkMtNJ_152646pn.jpg

 

Ultraviolet Light [preceding photo over-saturated to show center/edge differences]

asahi135&3.5Takumar_LscapeUVBaadSun_091714huberWoodsPkMtNJ_152646pnHiSat.jpg

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The Asahi 85mm f/4.5 Ultra-Achromatic-Takumar is corrected in UV, Visible and IR wavelengths. So I thought it would be interesting to make a test of that.

 

I focused on a fence post in Visible light using the Baader UV/IR-Cut Filter. Then I changed the filter to the B+W 093IR for the Infrared shot. After that the Baader UV-Pass filter was applied for the UV frame. No re-focusing was done after the filter changes.

 

Visible Light [f/11 for 1/100" @ ISO 160 in Sunlight with Baader UVIR-Block Filter]

asahi85&4.5UAT_ShiftTestVisSun_091714huberWoodsPkMtNJ_153423pn.jpg

 

Infrared Light [f/11 for 1/250" @ ISO 160 in Sunlight with B+W 093 IR-Pass Filter]

asahi85&4.5UAT_ShiftTest093IRSun_091714huberWoodsPkMtNJ_153509pn.jpg

 

Ultraviolet Light [f/11 for 1.6" @ ISO 400 in Sunlight with Baader UV-Pass Filter]

asahi85&4.5UAT_ShiftTestUVBaadSun_091714huberWoodsPkMtNJ_153545pn.jpg

 

OLD: Unresized Extracts of the Preceding 3 Photos

[uPDATE: I'm thinking that I might have not properly prepared these extracts with respect to equally applying sharpening/detail edits. So I'm going to add a new set below which I hope will be more objective.]

From left to right: Ultraviolet, Visible, Infrared.

asahi85&4.5UAT_ShiftTestUVBaadSun_091714huberWoodsPkMtNJ_153545pnExtract.jpgasahi85&4.5UAT_ShiftTestVisSun_091714huberWoodsPkMtNJ_153423pnExtract.jpgasahi85&4.5UAT_ShiftTest093IRSun_091714huberWoodsPkMtNJ_153509pnExtract.jpg

 

NEW: Unresized Extracts of the Preceding 3 Photos

The default Photo Ninja 'anti-aliasing' sharpening was used in each photo during conversion. For this composite, a subsequent gentle 2-pixel high pass overlay 'output' sharpening was applied to the two fenceposts in each photo to bring out the details a bit. The Details slider in PN was not used.

I do think there is some focus shifting between the wavelengths. I wonder if this kind of focus shift would occur if working more closely with the UAT?

Of course, another observation to be made with this added composite is that the Detail slider which was applied in the preceding composite (but unevenly) does make a whale of a difference in rendering details."-)

fencePostComposite_defaultPNSharp.jpg

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There is obvious focus shift in the last set, particularly between the visible and infrared.Your B+W 093 must be a lot thicker than both filters made by Baader?
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I think there is also a shift between the UV and Vis.

 

The B+W 093 has a 2mm thickness. It reaches 88% transmission at 900nm.

Reference: http://www.schneider...olor_Filter.pdf

 

Interestingly, I cannot find the thicknesses of the Baader filters on the Baader Planetarium website.

I'll keep looking.

 

Added Later:

The Astro-Physics shop gives 2mm as the thickness of ring-mounted 2" Baader filters.

http://astro-physics.com/index.htm?products/accessories/baader/filters/baaderfilters

 

So all filters were of the same thickness.

 

This would be an interesting test to repeat.

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I myself have a BIG question about the UV results across the tested lens set.

 

I profiled the K5 camera colour for each lens.

I shot a white reflective standard for each lens.

Each UV photo had the profiled white balance and K5 color applied for that lens.

 

Then WHY do the UV false color results vary so widely across the set?

Are all these lenses really recording UV so very differently??

I guess so.

 

For that matter the Visible color profiling is all over the map too.

Sigh.

 

Visible composite of the tested 35mm lenses.

K5_35VisibleComposite.jpg

 

UV composite of the tested 35mm lenses.

K5_35UVComposite.jpg

 

Visible (top) and UV(bottom) composite of the tested 50mm lenses.

K5_50Composite.jpg

 

Visible (top) and UV(bottom) composite of the tested 'long' lenses.

K5_longComposite.jpg

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Andrea, I would recommend you to take one lens, for example 3.5/35 Kyoei/Kuribayashi and shoot the same scene at all apertures, process shot at F/3.5 your regular way and apply the same settings to the rest of the shots (F/5.6, F/8, F/11, F/16) and see what happens.
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Thanks, Alex. A very good suggestion.

 

And I need to get offline for awhile, too. :D

 

****************

 

EDITOR's NOTE:

 

I split off the discussion here about profiling in Photo Ninja to its own thread:

Discussion of Profiling in Photo Ninja for UV Photos

 

See also the old thread about this:

Photo Ninja: Colour Correction: Light Source Tab

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