StephanN Posted March 28, 2021 Share Posted March 28, 2021 Apologies for the topic title, couldn't resist; I wonder how many people still remember Kraftwerk, the band I've been wanting to try out my Soligor tele-lens for some time, so I took it along today for my walk to the nearby power-station. It was in fine company, with the Soligor 21mm and the Steinheil Cassar-S 50mm. My version of the Soligor 300mm f/5.5 does not look like the one here: https://www.ultravio...Bsoligor+%2B300 , it looks pretty similar to this one: https://www.ebay.com...FkAAOSwxWZgBe2m , with the aperture ring very close to the rear end, although mine came in a M42-mount. The front-filter size is 58mm. Image quality, at least in the centre, is pretty good, but towards the edges it dropps off quite drastically. In VIS it's a bit better towards the edges, but if I want VIS edge-to-edge high quality, I'll go for some modern Canon lens anyway. But, it's a decent lens if you're happy with centre sharpness, and on EBay it's also dead cheap. The cameras were my usual onesUV: Canon EOS 6D, b/w, internal X330C, external S8612VIS. Canon EOS 5DSRIR: Canon EOS 6D, converted to 700nmSlight differences in the angles of view are due to the fact, that I took the UV photo from the tripod, but the other ones handheld. The first two sets are just standard shots from either bank of the river, with settings as follows. First set, Soligor 21mm f/3.8, at f/5.6, all ISO 100, UV 1s, VIS 1/640s, IR 1/250 s Second set, Steinheil Cassar-S 50mm f/2.8, at f/16, all ISO 100, UV 3.2s, VIS 1/200s, IR 1/60s Thrid set, that's the one for which I wanted to 300mm-lens, because it's mighty difficult to take a shot with this angle from the water . Soligor 300mm f/5.5, at f/16, UV ISO 100, 8s, VIS ISO 1600, 1/640s, IR ISO 800, 1/500s, distance to target probably some 200m, they were taken from the same spot as the Cassar-set. Last set, to highlight the quality issue. The photo was taken at f/16, ISO 100 and 12s., from the same spot as the preceding series.Full photoCenter crop 1000x1000Left edge, center 1000x1000Left lower corner 1000x1000 Link to comment
bvf Posted March 28, 2021 Share Posted March 28, 2021 Hi, Stephan. It's not clear to me in the very last shot how much the blurredness is due to lens quality and how much is due to focussing (because the trees are closer than the hydro plant). It would have ben interesting to reframe the image in each shot so that the same part of the subject appeared in each crop. Link to comment
StephanN Posted March 28, 2021 Author Share Posted March 28, 2021 Hi, Stephan. It's not clear to me in the very last shot how much the blurredness is due to lens quality and how much is due to focussing (because the trees are closer than the hydro plant). It would have ben interesting to reframe the image in each shot so that the same part of the subject appeared in each crop. You're quite right, I only thought about the comparison when I was already back home. The second one is better, because the building behind the trees is more or less in the same distance as the central part. Perhaps the lower right corner is better, because that also should be in the same distance, give and take a bit: Link to comment
dabateman Posted March 28, 2021 Share Posted March 28, 2021 Oh I remember crapwork as we used to call them. I like some of their music. This lens looks much better than expected and Enrico seems to think it's nearly the same transmission as a quartz lens outside. So I would expect some serious chromatic aberration, but thats not a problem in UV. Or maybe not a problem with this lens and if you get over its slow speed a possible UV telephoto winner. Link to comment
bvf Posted March 28, 2021 Share Posted March 28, 2021 Oh I remember crapwork as we used to call them. I like some of their music. "Paah-Paah-Paah auf der Autobahn" are the only lyrics I remember. So I would expect some serious chromatic aberration, but thats not a problem in UV. I would have thought it would be a problem. It won't manifest itself as colour fringeing, but it would cause a blurring/smudging. Link to comment
bvf Posted March 28, 2021 Share Posted March 28, 2021 Perhaps the lower right corner is better, because that also should be in the same distance, give and take a bit: Yes, you can really see the softness now compared with the centre crop. Link to comment
nfoto Posted March 28, 2021 Share Posted March 28, 2021 I'm fond of Kraftwerk. Once attended a performance of TEE Trans Europe Express in Berlin. Link to comment
StephanN Posted March 28, 2021 Author Share Posted March 28, 2021 For those who don't know: Modernized version: Link to comment
OlDoinyo Posted March 28, 2021 Share Posted March 28, 2021 Your test subject contains very little UV chromaticity (judging by the Steinheil shot) which makes bandpass difficult to judge. In general, you can very much get CA in UV photos; I have seen it manifest both as radial blur and as actual colored fringing. There are other things that cause radial blur as well, so in the absence of color evidence it is hard to say. Link to comment
StephanN Posted March 29, 2021 Author Share Posted March 29, 2021 Your test subject contains very little UV chromaticity (judging by the Steinheil shot) which makes bandpass difficult to judge. In general, you can very much get CA in UV photos; I have seen it manifest both as radial blur and as actual colored fringing. There are other things that cause radial blur as well, so in the absence of color evidence it is hard to say. It is pretty well hidden in the initial post, but my UV-shots were taken with a black/white camera, so probably that's the reason for the lack of colour, or am I missing something here? Link to comment
dabateman Posted March 29, 2021 Share Posted March 29, 2021 Kraftwerk in visible with Canon 40mm F2.8 lens: Kraftwerk illuminated with Nemo UV light with Canon 40mm F2.8 lens: This was the first record I saw. Works with illumination at road point. I might have others. Link to comment
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