sean_reid Posted November 18, 2007 Share #81 Posted November 18, 2007 Advertisement (gone after registration) That is a great portrait of your daughter, Guy. You should be proud. The Summarit can't match the creamy background of the Summilux at f1.4. However, I think the Summarit will look very much like the Summilux at f2.5. The Summarit is very sharp and has a smooth, but not harsh, out of focus area. It is too bad we cant do side-by-side comparison. I'm doing the following side by side, including OOF rendering: 35 Summarit, 35 Summicron, 35 Zeiss, CV 35/2.5 50 Summarit, 50 Summicron, 50 Zeiss, CV 50/2.5 (if it arrives in time) 75 Summarit, 75 Summicron, CV 75/2.5 90 Summarit, 90 Summicron, 85 Zeiss, CV 90/3.5 Doing res tests right now...still. Cheers, Sean Link to post Share on other sites More sharing options...
Advertisement Posted November 18, 2007 Posted November 18, 2007 Hi sean_reid, Take a look here First Impressions of 75mm Summarit. I'm sure you'll find what you were looking for!
robsteve Posted November 18, 2007 Share #82 Posted November 18, 2007 Hi Rob, I thought you didn't like the effect of higher contrast on the mid-tones. Cheers, Sean I probably didn't understand how to say what I meant to say. The Summarits have the look of a file where the blacks aren't black enough, and the mid tones are a bit too high. Like the wrong curve has been applied to them, such as using the fill light slider in Lightroom or perhaps a portrait look instead of a product look. I am sure if you shoot your railroad cars with the 75mm Summarit and then the 75mm Summicron and process the files the same way, you will see a difference. The 75mm Summicron will have more fine detail in the paint and higher contrast on the rusty hinges and fittings. There is a question as to whether this may be a M8 coding/processing thing. The way to test this is to shoot the same shot with the coding off and see if anything changes. Link to post Share on other sites More sharing options...
sean_reid Posted November 18, 2007 Share #83 Posted November 18, 2007 Hi Rob, The res tests are being done uncoded and without filters. Res subject is new. You may be pleasantly surprised at how the Summarits compare to the Summicrons. Cheers, Sean Link to post Share on other sites More sharing options...
c6gowin Posted November 18, 2007 Author Share #84 Posted November 18, 2007 Sean, I am really looking forward to seeing your results and not just for the 75mm. I appreciate how much work it is to do the tests and I am just working on one lens and one focal length. It is fun, but time consuming and tedious at times. Link to post Share on other sites More sharing options...
sean_reid Posted November 18, 2007 Share #85 Posted November 18, 2007 Sean, I am really looking forward to seeing your results and not just for the 75mm. I appreciate how much work it is to do the tests and I am just working on one lens and one focal length. It is fun, but time consuming and tedious at times. That's funny that you should say that. I'm working on res tests tonight (with their infinite focus bracketings and reshoots and whatnot) and it occurred to me that you might be doing the same thing (and thanking your lucky stars you don't do this all the time <G>). Its tedious all right, if one is being careful and thorough. Looking forward to comparing notes. Cheers, Sean Link to post Share on other sites More sharing options...
c6gowin Posted November 18, 2007 Author Share #86 Posted November 18, 2007 Funny you would mention reshoots. I worked on processing my resolution test photos enough tonight to know that I need to do a reshoot in order to eliminate any questions I have with my technique and choice of subject. I got at laugh at myself driving around looking for an interesting texture filled flat subject. Link to post Share on other sites More sharing options...
sean_reid Posted November 18, 2007 Share #87 Posted November 18, 2007 Advertisement (gone after registration) It's not easy. And then one has to be sure that the light doesn't change at all during the series (focus-bracketing each lens, of 4 - 5 lenses total usually). This will be the first review where I use my new and very unusual "resolution board" which was created just for the purpose. The tests are done at night under fixed lighting and there are all kinds of subjects sitting on a plane. Minute focus bracketing is key. Cheers, Sean Link to post Share on other sites More sharing options...
rosuna Posted November 18, 2007 Share #88 Posted November 18, 2007 Can you get a loaned Summilux 75mm for the tests? It would be interesting. Link to post Share on other sites More sharing options...
hankg Posted November 18, 2007 Share #89 Posted November 18, 2007 It's not easy. And then one has to be sure that the light doesn't change at all during the series (focus-bracketing each lens, of 4 - 5 lenses total usually). This will be the first review where I use my new and very unusual "resolution board" which was created just for the purpose. The tests are done at night under fixed lighting and there are all kinds of subjects sitting on a plane. Minute focus bracketing is key. Cheers, Sean Sean I tried to PM you but your box is full... I hope they are not all from Mark:) I have a coded 75mm Summilux at DAG right now getting a CLA / focus calibration. Assuming he can get the lens up to spec, I could have him send it to you instead of me so you could include it in your 75mm test. How long would you need it for testing? PM me. Link to post Share on other sites More sharing options...
c6gowin Posted November 21, 2007 Author Share #90 Posted November 21, 2007 Sean, I look forward to seeing your resolution test board. I have shot and re-shot several different resolution test subjects and have a new appreciation for finding suitable targets and lighting. Good idea on shooting at night under controlled lighting conditions. My best effort at resolution tests are shown below. It is a rather bland test subject, but all of the other test subjects I shot presented problems because they were not flat enough to ensure resolution was not affected by the shallow depth of field of the 75mm. The test subject and camera were both in the shade of a sunny bright afternoon. The first photo shows the full frame. The remaining photos are center crops beginning with f2.5, f2.8, f4, f5.6, f8, f11, f16. 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! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/37899-first-impressions-of-75mm-summarit/?do=findComment&comment=408031'>More sharing options...
c6gowin Posted November 21, 2007 Author Share #91 Posted November 21, 2007 f8, f11, f16 follow 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! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/37899-first-impressions-of-75mm-summarit/?do=findComment&comment=408034'>More sharing options...
sean_reid Posted November 21, 2007 Share #92 Posted November 21, 2007 I have some suggestions that we could either discuss on the thread or privately. Let me know if you're interested. Cheers, Sean Link to post Share on other sites More sharing options...
sean_reid Posted November 21, 2007 Share #93 Posted November 21, 2007 Can you get a loaned Summilux 75mm for the tests? It would be interesting. Hi Ruben, The max aperture is so far from F/2.5 that I'll think what I'll do is a 75 Summilux vs. 75 Summicron comparison down the road. Best, Sean Link to post Share on other sites More sharing options...
c6gowin Posted November 21, 2007 Author Share #94 Posted November 21, 2007 A better test subject would have more varied textures, details, etc. I wished I could have found something better. I have shot over 700 frames with the 75mm Summarit and it has been an excellent performer. I really hate to pack up the lens and ship it back - I would much rather send Leica a check and keep the lens. I will be buying this lens as soon as I can. I have included a few other photos taken with the 75mm Summarit just for the fun of it. 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! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/37899-first-impressions-of-75mm-summarit/?do=findComment&comment=408042'>More sharing options...
c6gowin Posted November 21, 2007 Author Share #95 Posted November 21, 2007 I have some suggestions that we could either discuss on the thread or privately. Let me know if you're interested. I am interested in any suggestions you have. Feel free to post them here or PM. Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted November 21, 2007 Share #96 Posted November 21, 2007 Mark that Wooden shed would have been perfect for a lens test. I went out yesterday to do my sharpness test with the 35,50,90 summarits actually you have the 75 i was supposed to get:D and run them against the 35 cron version IV , 50 lux and 90 cron but i hated everything i saw so i gave up . Heading north for a couple days and will shoot them in Flagstaff tomorrow morning , i have a spot in mind up there. I hate charts and refuse to shoot them anymore. I will post the results on both sites with center and corner corps. To be honest i have put the summarits up to the best lenses leica makes the 50 lux and 90 cron and there doing a very nice job comparing, there not going to beat them but I think they maybe the best out there for the money comparing to the high end Leica glass. Honestly there performing better than i expected as Sean and i both talked about the other day we are pretty impressed by there performance. Link to post Share on other sites More sharing options...
c6gowin Posted November 21, 2007 Author Share #97 Posted November 21, 2007 I did resolution tests with several different test targets from old wooden sheds, wood doors, leaves on the ground, moss covered rock, etc. and there were problems with almost all of them. The problems I found upon close inspection were too much 3 dimension (not flat enough to stay in depth of field), subtle changes in the light, and believe it or not, the test subject itself not sharp enough to show full resolution of the lens. I found the lens did an excellent job of reproducing the textures of weathered wooden sheds and doors I shot, but those subjects didn't really contain hard well-defined edges which would challenge the lens resolution. Perhaps my choice of wood sheds and doors were too weathered. I will happily post corner crops of the test target already shown crops from some of my other resolution test crops if anyone is interested. For what it is worth, I found resolution to be excellent and pretty much even across the frame. I believe my difficulty in finding a suitable resolution test target proves how good the 75mm Summarit is because it clearly showed flaws in the test targets. Link to post Share on other sites More sharing options...
sean_reid Posted November 21, 2007 Share #98 Posted November 21, 2007 I believe my difficulty in finding a suitable resolution test target proves how good the 75mm Summarit is because it clearly showed flaws in the test targets. At that point, why torture yourself further? Without a reference lens for comparison, its especially difficult to get a baseline for these sorts of things. I was going to advise you on some resolution test approaches but if you already know the lens shows excellent resolution even wide open, maybe it would be more fun to just go shoot with it under as wide a variety of conditions as you can find. Cheers, Sean Link to post Share on other sites More sharing options...
stunsworth Posted November 21, 2007 Share #99 Posted November 21, 2007 ...but if you already know the lens shows excellent resolution even wide open, maybe it would be more fun to just go shoot with it under as wide a variety of conditions as you can find. My aproach entirely <grin> Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted November 21, 2007 Share #100 Posted November 21, 2007 At that point, why torture yourself further? Without a reference lens for comparison, its especially difficult to get a baseline for these sorts of things. I was going to advise you on some resolution test approaches but if you already know the lens shows excellent resolution even wide open, maybe it would be more fun to just go shoot with it under as wide a variety of conditions as you can find. Cheers, Sean I agree, Sean and I are going against other lenses for comparisions , just go shoot some images and see how it feels for you. This crap is boring anyway. LOL Nice thing is Sean and mine are different lenses too so nice to get a whole picture later on but there not lacking much so far. We both like them Link to post Share on other sites More sharing options...
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