Search found 598 matches

by dmillard
Wed Dec 16, 2020 4:14 pm
Forum: Equipment Discussions
Topic: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)
Replies: 26
Views: 3926

Re: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)

These are some images I just took with the Olympus UPlanApo 4x/0.16, UMPlanFL 10x/0.30, and an LMPlanFL 20x/0.40 on a Sony A6300, using an ITL200 tube lens. The predicted magnification would have been 200/180 times each objective's nominal magnification - I measured 4.38x rather than the expected 4....
by dmillard
Wed Dec 09, 2020 3:59 pm
Forum: Equipment Discussions
Topic: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)
Replies: 26
Views: 3926

Re: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)

I found this lens used at a good price and being aware that Charles Krebs uses it with excellent results I bought it. It came pretty dirty and after a good cleaning I'm testing it. I find the results pretty good although my testing abilities and subjects are not the best. Chromatic aberrations are ...
by dmillard
Thu Nov 19, 2020 9:41 am
Forum: Equipment Exchange
Topic: For Trade: Tomioka 32mm f3.5 and Gretag 120
Replies: 4
Views: 1412

Re: For Trade: Tomioka 32mm f3.5 and Gretag 120

I just received one of the Gretag 120s from Ray a few days ago - it was in better condition than I had anticipated from the description. :)

David
by dmillard
Sat Oct 10, 2020 11:58 am
Forum: Equipment Discussions
Topic: Schneider locking screws
Replies: 29
Views: 5048

Re: Schneider locking screws

Thanks, good to know there are at least two variations of these locking screws. You are welcome. Just to clarify, I measured a locking screw from a Unifoc-58, not the smaller Unifoc-12 for which Ray needed replacement screws. I was hoping to appropriate it, at least temporarily, for the MacroVaron,...
by dmillard
Sat Oct 10, 2020 11:20 am
Forum: Equipment Discussions
Topic: Schneider locking screws
Replies: 29
Views: 5048

Re: Schneider locking screws

Just wondering, are these thumbscrews identical to the ones from the Xenoplan machine vision line of lenses? Anyone owning both types of lenses? I measure the Xenoplan ones to have a width of 2.4mm over the peaks of the screw thread and be 4mm in length, with the final mm close to the knurled head ...
by dmillard
Sat Jul 18, 2020 5:19 am
Forum: Equipment Discussions
Topic: linos lens 105mm F 5.6 need help
Replies: 7
Views: 2011

Re: linos lens 105mm F 5.6 need help

Doesn't the 105/5.6 feature a Schneider Optics V-groove dovetail mount? I could be wrong. If I'm not, an original Schneider adaptor that converts the dovetail to M42 can be had for around $50 used. Not cheap but you do get Schneider's quality. The Schneider mounts are V38, but the Linos 5.6 inspec....
by dmillard
Fri Jul 17, 2020 6:40 am
Forum: Equipment Discussions
Topic: Test wafer distribution: Many features, includes res chart
Replies: 80
Views: 17764

Re: Test wafer distribution: Many features, includes res chart

I just got mine. It was left on our front porch yesterday, even though it had been marked as delivered quite a while ago. I assume it was placed in the wrong mail box, and our anonymous neighbor had their own reasons for the delay. Anyway, it is broken into numerous pieces, but one of them is large ...
by dmillard
Sat Jun 27, 2020 12:38 pm
Forum: Equipment Discussions
Topic: US Buyers Beware of Tariffs on EU Products
Replies: 20
Views: 3020

Re: US Buyers Beware of Tariffs on EU Products

An addendum: On Thursday the U.S. Trade Representative proposed an additional 25% tariff on German lenses (as well as increased import fees on many other items). This proposal is open to public comment until July 26th. https://ustr.gov/sites/default/files/enforcement/301Investigations/Review_of_Acti...
by dmillard
Sat Jun 27, 2020 10:09 am
Forum: Equipment Discussions
Topic: US Buyers Beware of Tariffs on EU Products
Replies: 20
Views: 3020

Re: US Buyers Beware of Tariffs on EU Products

Thank you for the update Robert! This definitely reduces my occasional temptations for early a.m. Buy It Now purchases :shock:

Best regards,
David
by dmillard
Sat Jun 27, 2020 7:14 am
Forum: Equipment Discussions
Topic: US Buyers Beware of Tariffs on EU Products
Replies: 20
Views: 3020

Re: US Buyers Beware of Tariffs on EU Products

Thanks David, I'm hopeful that it may be the perfect FF tube lens. Another potential option for a FF tube lens may be a Pentax 67 300mm f/4 EDIF. It doesn't have the spectral sensitivity range of the Zeiss lens, weighs considerably more, and has a greater front filter thread (82mm vs 60mm), but it ...
by dmillard
Fri Jun 26, 2020 8:26 pm
Forum: Equipment Discussions
Topic: US Buyers Beware of Tariffs on EU Products
Replies: 20
Views: 3020

Re: US Buyers Beware of Tariffs on EU Products

Are there more countries besides the ones you listed which have a 25% tariff? Or is itthe place of manufacture that matters? But for most products that is not obvious. For lenses (and other photographic equipment), the place of manufacture is restricted to Germany. See https://captureintegration.co...
by dmillard
Sun Jun 21, 2020 12:01 pm
Forum: Equipment Discussions
Topic: Linos inspec.x L 5.6/105 Line Scan Lens Test at 0.3x and 3x
Replies: 7
Views: 1639

Re: Linos inspec.x L 5.6/105 Line Scan Lens Test at 0.3x and 3x

Thanks for another excellent test Robert.

Congratulations on your recovery, and wishing you a great year to come! :D

Best regards,
David
by dmillard
Sun Jun 21, 2020 11:53 am
Forum: Equipment Discussions
Topic: Camera flange to sensor distance variation
Replies: 2
Views: 1123

Re: Camera flange to sensor distance variation

Thanks Lou.

If there is a correlation between the number of shutter actuations in the Sony full-frame mirrorless cameras and the failure of their sensor-IBIS mounts (not directly addressed in the article), it would have implications for routinely using these cameras to do large stacks. :-k
by dmillard
Sun Jun 21, 2020 6:33 am
Forum: Equipment Discussions
Topic: Camera flange to sensor distance variation
Replies: 2
Views: 1123

Camera flange to sensor distance variation

An interesting (and slightly disturbing) article from Roger Cicala:

https://www.lensrentals.com/blog/2020/0 ... o-cameras/
by dmillard
Thu Jun 18, 2020 1:05 pm
Forum: Equipment Discussions
Topic: Test wafer distribution: Many features, includes res chart
Replies: 80
Views: 17764

Breathtaking images - thank you for sharing!