xelavelobos Posted January 11, 2018 Share Posted January 11, 2018 Hello All, I am new to the forum and haven’t done any IR or UV photography since my anolog days early in college. I am looking to try my hand at it again. I shoot with a 2012 Pentax K-5 and a variety of vintage Asahi Super-Multi-Coated Takumars. What kind of results can I expect with this camera if I don’t have it modified to remove the filter over the sensor? Thanks, -Alex Link to comment
nfoto Posted January 11, 2018 Share Posted January 11, 2018 Welcome to UVP. Without modifying the camera it is unlikely that you can acquire anything UV or IR worth its while. Link to comment
Andy Perrin Posted January 11, 2018 Share Posted January 11, 2018 Yeah, unfortunately modified camera is a prerequisite for this hobby. For infrared you will need a long pass IR filter (the Hoya R72 is good). For ultraviolet you will need to obtain a lens without coatings (see the stickies for examples) and a UV filter glass and IR blocker glass OR a dichroic filter like the Baader U. Link to comment
Damon Posted January 12, 2018 Share Posted January 12, 2018 Re: modified camera is a prerequisite for this hobbyThat's not entirely true... :) http://www.ultravioletphotography.com/content/index.php/topic/1213-canon-1d-mark-iv-unmodified-for-uv/page__hl__gazania__st__40 Link to comment
Andy Perrin Posted January 12, 2018 Share Posted January 12, 2018 Ok, if you have a sufficiently ancient camera it is possible. The Canon 1D Mark IV came out 9 years ago... Link to comment
Andrea B. Posted January 12, 2018 Share Posted January 12, 2018 Hello Alex and welcome to UVP. Some older DSLRs (2007, 2008) had a fairly weak internal UV/IR blocking filters and were useable without modification. We have so few Pentax users* that I have no records of how the K5 performs without modification. As Bjørn has often said -- with enough time and strong enough light you can force UV or IR through almost any camera & lens combination, but the results may not be useful due to noise, underexposure and detail loss. So the only thing I can say is to give the unmodded K5 a try. Then compare what you've got to some of the good photos on the site here. Coating on a lens is often there to block UV or IR in addition to acting as anti-reflective. So again, all you can do is try with your Super-Multi-Coated Takumars to see what happens. Fortunately there are lots of old uncoated 35/3.5 M42 screw mount lenses available on Ebay which are easily adapted to that K5. If you are using vintage screwmount Taks, then you probably already have the mount modifier? *I have a modded K5, and it is an excellent camera for UV or IR after modification. Link to comment
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