• Ultraviolet Photography
  •  

Stella in sunlight

UV Lighting
3 replies to this topic

#1 enricosavazzi

    Member

  • Members
  • 410 posts
  • Location: Stockholm, Sweden

Posted 28 May 2018 - 12:36

All with "full spectrum" Olympus E-PL6 set to built-in sunlight color balance and auto ISO (except with Asahi Spectra filter, manually set to 3200 ISO), Prinz Galaxy 35 mm f/3.5 (the good one), natural sunlight.

Attached Image: P5280016c.JPG
Baader U

Attached Image: P5280016cb.JPG
same as above, color-desaturated to BW. No sharpening, but color desaturation makes it look definitely sharper.

Attached Image: P5280483c.JPG
Asahi Spectra XRR0340

Attached Image: P5280483cb.JPG
same as above, color-desaturated to BW. Also this one looks sharper. Note also the highly reflective eyes.

Attached Image: P5280030c.JPG
Baader UVIR cut (just remember that it is not designed to restore to original color balance of the camera, it only cuts UV and IR)

Attached Image: P5280030cb.JPG
same as above, color-desaturated to BW

PS- I was recently asked about the UV performance of the Sigma 30 mm f/2.8. Since this can be of general interest, here is a quick test. The following pictures are shot with this lens and the Asahi Spectra XRR0340 at 3200 ISO. Exposure time was much longer than with the Prinz Galaxy 35 mm in spite of opening up to f/5.6 (although sunlight varies, so this is not a very reliable test). The most important result is that the false color is quite similar to that obtained with the Baader U filter and the Prinz Galaxy 35 mm, which probably means the Sigma 30 mm does not transmit below approximately 370-380 nm. The Sigma 30 mm does provide autofocus, but the Prinz Galaxy 35 mm is overall better for UV imaging.

Attached Image: P5280493c.JPG

Attached Image: P5280493cb.JPG

Edited by enricosavazzi, 28 May 2018 - 13:34.

-- Enrico Savazzi

#2 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 6,441 posts
  • Location: USA

Posted 28 May 2018 - 15:25

Enrico, I think this topic needs a UV Lens tag because you discuss lenses?
****

This last photo has me smiling. Those ears!! A very sweet looking little dog is Stella.
***

Baader UVIR cut (just remember that it is not designed to restore to original color balance of the camera, it only cuts UV and IR).

A good reminder.
Andrea G. Blum
Often found hanging out with flowers & bees.

#3 Andy Perrin

    Member

  • Members(+)
  • 1,458 posts
  • Location: United States

Posted 28 May 2018 - 16:53

What about filtering by windows/skylights? Or was this outdoors?

#4 enricosavazzi

    Member

  • Members
  • 410 posts
  • Location: Stockholm, Sweden

Posted 28 May 2018 - 19:33

View PostAndy Perrin, on 28 May 2018 - 16:53, said:

What about filtering by windows/skylights? Or was this outdoors?
Outdoors, direct sunlight without any glass.
-- Enrico Savazzi