Tailwagger Posted December 1, 2019 Share #1  Posted December 1, 2019 Advertisement (gone after registration) I decided, given the weather is arriving in the NE today, that I'd try to do the silliest, most useless test I could think of to take my mind off winter. So I pulled out my tripod, set it up in a room with a little natural light and mounted the SL2 on it. Then with the SL-75, I shot frames at f2, a stop at a time to f8. I followed this by mounting my beloved 75 Summilux-M and repeated the process. Finally, I mounted the Voigtlander 75mm Heliar and yet again, shot the series. The latter two where both set to 75 'lux in camera. The scene was shot at a distance of 10 feet, give or take an inch or two. I'm not generally disposed to testing, but I was curious as to how a wide the gulf between the native lens would be against an M favorite, as well as how a relatively inexpensive non-Leica M lens might fair. As the SL-75 is the only native lens I own at the moment,  it came down to these three. General observations. As you might expect, the SL-75 results look a bit sharper, but that could be down to old eyes and nervous fingers. The Summilux is close on its heals, the Heliar in third. Vignetting was a similar story, the 'lux and Heliar showing progressively more. Interestingly, those two both exhibited more bluish cast in the corners with the Heliar again suffering the most in my view. Another little twist, where the two Leica lenses shot the scene at precisely the same settings, curiously at F2, the Heliar shot the scene at a lower shutter speed. Once stopped down, it matched the Leica glass precisely. ie the SL-75 f2@1/160", the 'lux f2@1/160"... camera reporting f2.8, the Heliar f2@1/125" with the camera reporting f3.4. Lighting was natural, but constant, at least to the eye. At f4.0 all three were exposed at 1/40", with the 'lux again reporting off by a half stop, but this time the Heliar also reporting f5.6. Make of that what you will. Everything SooC. f2.0: Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! I'll post center and corner crops shortly. If perhaps this test isn't quite as silly as I think ad others are curious, I'll take the time to show things at other apertures, but suffice to say that beyond slight differences in color cast, the differences diminish with aperture, as one would expect.     3 Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! I'll post center and corner crops shortly. If perhaps this test isn't quite as silly as I think ad others are curious, I'll take the time to show things at other apertures, but suffice to say that beyond slight differences in color cast, the differences diminish with aperture, as one would expect.     ' data-webShareUrl='https://www.l-camera-forum.com/topic/304031-the-dumbest-most-useless-test-ever/?do=findComment&comment=3865422'>More sharing options...
Advertisement Posted December 1, 2019 Posted December 1, 2019 Hi Tailwagger, Take a look here The dumbest, most useless test ever!. I'm sure you'll find what you were looking for!
Tailwagger Posted December 1, 2019 Author Share #2  Posted December 1, 2019 Center crop at f2.0 100%: Summicron: Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Lux: Heliar  2 Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! Lux: Heliar  ' data-webShareUrl='https://www.l-camera-forum.com/topic/304031-the-dumbest-most-useless-test-ever/?do=findComment&comment=3865425'>More sharing options...
Shlomo Posted December 1, 2019 Share #3  Posted December 1, 2019 (edited)  - no stupidity around here, SL-75 is best, tailwaggerly proven. Cheers, Shlomo.  OMG: just looked up the translation of tailwagger, If You manage to shot by doing so  in exactly that way, Congratulations! 😄 Edited December 1, 2019 by Shlomo 1 Link to post Share on other sites More sharing options...
Tailwagger Posted December 1, 2019 Author Share #4  Posted December 1, 2019 Corners @ f2.0 The APO advantage seems clearly on display here. SL-75 Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Lux Heliar 1 Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! Lux Heliar ' data-webShareUrl='https://www.l-camera-forum.com/topic/304031-the-dumbest-most-useless-test-ever/?do=findComment&comment=3865447'>More sharing options...
Tailwagger Posted December 1, 2019 Author Share #5  Posted December 1, 2019 Size differential of the above is down to slight different fields of view, coupled with the author being too lazy to try to get everything precisely the same size. Link to post Share on other sites More sharing options...
Tailwagger Posted December 1, 2019 Author Share #6  Posted December 1, 2019 16 minutes ago, Shlomo said:  OMG: just looked up the translation of tailwagger, If You manage to shot by doing so  in exactly that way, Congratulations! 😄 Hmmm... wonder what that might be? Anyway just to make sure no one gets the wrong impression, the moniker comes from a a couple of decades of racing a vintage Porsche 911, a vehicle well known for 'shakin its booty' so to speak. 1 2 1 Link to post Share on other sites More sharing options...
jaapv Posted December 1, 2019 Share #7  Posted December 1, 2019 Advertisement (gone after registration) You should have used fruit  1 Link to post Share on other sites More sharing options...
bags27 Posted December 1, 2019 Share #8  Posted December 1, 2019 A terrific test. IIRC, the L35 f/2 is supposed to be even sharper. I bet these summicrons paired with the SL2 are in the range of tolerance of scientific instruments. Link to post Share on other sites More sharing options...
scott kirkpatrick Posted December 1, 2019 Share #9  Posted December 1, 2019 There's a Karbe interview somewhere where he muses that his current lenses are probably good up to 100 MPx. Here's a tiny speck of 100% SL-SC 35 image, shot wide open: Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! P1022719 copy2 by scott kirkpatrick, on Flickr see if you can figure out where in the full frame this speck belongs: P1022719 copy by scott kirkpatrick, on Flickr shot this on my S1R, but I'll be back with an SL2 after my next trip. I may have to start making 200% blowups to see the limits of this lens. 2 Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! P1022719 copy2 by scott kirkpatrick, on Flickr see if you can figure out where in the full frame this speck belongs: P1022719 copy by scott kirkpatrick, on Flickr shot this on my S1R, but I'll be back with an SL2 after my next trip. I may have to start making 200% blowups to see the limits of this lens. ' data-webShareUrl='https://www.l-camera-forum.com/topic/304031-the-dumbest-most-useless-test-ever/?do=findComment&comment=3865602'>More sharing options...
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