Search found 598 matches
- Mon Oct 08, 2018 2:08 pm
- Forum: Equipment Discussions
- Topic: Stacked Lens vs APO objectives at 4x with Surprising Results
- Replies: 88
- Views: 8966
Well, for anybody that missed out on the Makro-Symmar, I will be posting one for sale very soon! :) As Robert previously said, usedparts-semifa is one of the best. I ordered the lens Thursday, and received it this morning before 9:00 am, extremely well-packed. I then quickly tested it against the Ma...
- Sun Oct 07, 2018 6:47 pm
- Forum: Equipment Discussions
- Topic: Stacked Lens vs APO objectives at 4x with Surprising Results
- Replies: 88
- Views: 8966
In 2012 I posted that I have a 35mm f/2.0 Mid 1977 (looks much like the one above) 28mm f/2.0 Approx 1943 (looks older!) That's interesting Chris. I just looked in Kingslake's History of the Photographic Lens , and according to him, the Schneider Xenon is an unsymmetrical six element double-Gauss l...
- Sun Oct 07, 2018 3:20 pm
- Forum: Equipment Discussions
- Topic: Stacked Lens vs APO objectives at 4x with Surprising Results
- Replies: 88
- Views: 8966
Thanks again for sharing the performance of this lens combo! From Schneider's data at https://www.schneideroptics.com/info/age_of_lenses/ , your particular 28mm & 35mm Xenons were produced in 1995 and 1996 respectively, but Schneider doesn't provide information about how long and how many of either ...
- Sun Oct 07, 2018 8:18 am
- Forum: Equipment Discussions
- Topic: Stacked Lens vs APO objectives at 4x with Surprising Results
- Replies: 88
- Views: 8966
- Thu Oct 04, 2018 8:53 pm
- Forum: Equipment Discussions
- Topic: Stacked Lens vs APO objectives at 4x with Surprising Results
- Replies: 88
- Views: 8966
- Thu Oct 04, 2018 8:20 pm
- Forum: Equipment Discussions
- Topic: Lee diffusers?
- Replies: 14
- Views: 1607
I use a variety of Lee filters, primarily as cylinders on my Mitutoyo and Olympus objectives. I often combine them with an inner layer of 214 Tough Spun to further cut interior reflections, or selectively mask them with black cardstock. Like Harald, I have found them to be very color neutral, but I ...
- Mon Oct 01, 2018 11:03 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Foraminifera fossils
- Replies: 5
- Views: 1450
- Tue Sep 25, 2018 1:35 pm
- Forum: Equipment Discussions
- Topic: 5x Magnification Ideas and Suggestions
- Replies: 27
- Views: 3405
A quick test of the 7.5X with an Apo-Symmar 135mm f/5.6 shows that it easily covers the full frame of a Sony A7Rii at 4.91X. I think the darkened corners seen here may result from mechanical vignetting somewhere else in my system (the lens aperture, PB-6 bellows, or the Nikon-Sony adapter), rather t...
- Sat Sep 22, 2018 9:28 pm
- Forum: Equipment Discussions
- Topic: 5x Magnification Ideas and Suggestions
- Replies: 27
- Views: 3405
Re: 5x Magnification Ideas and Suggestions
Possibly a Nikon CFI Plan Apo 4/0.20 or an Olympus UPlanApo 4/0.16 pushed to approximately 5x with tube lenses of the appropriate focal lengths (250mm and 225mm, respectively).RobertOToole wrote:Any ideas or suggestions for a 5x test?
- Sat Sep 01, 2018 5:23 am
- Forum: Equipment Discussions
- Topic: (LSA || DCR150 || ITL200) ? FF : CROP
- Replies: 58
- Views: 5503
Hi David, Many thanks for the test! Can you change the power of the Vivitar 283? If yes, which value have you used? I’m asking for that because your diffuser of Leelux 400 absorbs a lot of light. BTW, what is a paper Waterhouse stop ? BR, ADi The Leelux 400 absorbs a lot, plus I used an inner cylin...
- Sat Sep 01, 2018 5:07 am
- Forum: Equipment Discussions
- Topic: (LSA || DCR150 || ITL200) ? FF : CROP
- Replies: 58
- Views: 5503
- Fri Aug 31, 2018 8:39 pm
- Forum: Equipment Discussions
- Topic: (LSA || DCR150 || ITL200) ? FF : CROP
- Replies: 58
- Views: 5503
Hello everybody, Has anybody tested the tube-lenses 360mm / 300mm / 240mm ? Hello Adalbert, I had hoped to do show you a comparison between some large format lenses in those focal lengths, but unfortunately found I had misplaced a few important components for my Aristophot stand, which I have negle...
- Wed Aug 29, 2018 5:47 am
- Forum: Equipment Discussions
- Topic: (LSA || DCR150 || ITL200) ? FF : CROP
- Replies: 58
- Views: 5503
What about this one (OK, is expensive but APO) https://www.ebay.de/itm/Rodenstock-Apo-Ronar-9-360mm-14inch-Objektiv-lens-90170/332098746576?hash=item4d52a0b8d0:g:CnYAAOSw5cNYg1lT BR, ADi I previously found the Apo-Ronar 240mm f/9 to be very free of chromatic aberration, but my copy was one that may...
- Tue Aug 28, 2018 10:51 am
- Forum: Equipment Discussions
- Topic: (LSA || DCR150 || ITL200) ? FF : CROP
- Replies: 58
- Views: 5503
I'd like to reinforce what Jorgen said about focal length vs format size. If you are happy with a given objective on a tube lens of focal length 200mm on APS, you will get exactly that same image, with same corner quality, filling the FF sensor if you use change to a tube lens of 300mm. I am using ...
- Sat Aug 11, 2018 11:41 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Scotch Thistle
- Replies: 5
- Views: 1220