Search found 633 matches
- Thu Mar 28, 2024 8:47 am
- Forum: General Discussion Forum and Community Announcements
- Topic: Loss of Robert OToole
- Replies: 28
- Views: 823
Re: Loss of Robert OToole
I am very, very sorry to hear of Robert's passing. I admired his encyclopedic knowledge about a wide array of often obscure lenses, his constant curiosity and disciplined testing, and the generosity with which he shared his clearly presented results. I also enjoyed the insights (and humor) that he s...
- Tue Dec 19, 2023 6:36 pm
- Forum: Equipment Discussions
- Topic: who has the new Laowa 90mm/2,8 2:1 Macro?
- Replies: 39
- Views: 11652
Re: who has the new Laowa 90mm/2,8 2:1 Macro?
A little late to the party, but thank you for this very useful information Lothar.
Best regards,
David
Best regards,
David
- Tue Jul 04, 2023 2:43 pm
- Forum: Equipment Discussions
- Topic: Olympus U TLU tube lens vs SWTR-2 Superwide Head
- Replies: 11
- Views: 2728
Re: Olympus U TLU tube lens vs SWTR-2 Superwide Head
For Peter and anyone else who wanted to incorporate the SWTLU-C tube lens into a Thorlabs SM2 system, RafCamera offers an M41x0.5♀ to SM2♂ adapter, although I have no idea what issues there may be with shipping at this time.
- Thu Apr 27, 2023 6:35 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: SONY AWARD
- Replies: 25
- Views: 4510
Re: SONY AWARD
Congratulations - wonderful images!
- Mon Apr 17, 2023 4:49 am
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Pushing down the PN105 and Scanner Nikkor to a FOV of 100mm
- Replies: 5
- Views: 1398
Re: Pushing down the PN105 and Scanner Nikkor to a FOV of 100mm
Thanks for sharing your brilliant discovery about exploiting the entire image field of the PN105 (if only d'Abrera had used this lens and technique!). I also like the idea of mounting this lens inside the camera, supported by the lensboard. You are probably already aware of it, but you can also use ...
- Mon Dec 19, 2022 11:13 am
- Forum: Equipment Discussions
- Topic: Qioptiq LINOS d.fine HR-M 2.8/80 0.2x Lens Test Results
- Replies: 29
- Views: 4769
Re: Qioptiq LINOS d.fine HR-M 2.8/80 0.2x Lens Test Results
Somewhat tangential to the original topic, but I have used the 35mm target slides offered at the site below to inexpensively provide a qualitative assessment of lenses intended for slide duplication.
https://www.film4ever.info/vtt#h.3b4dfm4hmbm5
https://www.film4ever.info/vtt#h.3b4dfm4hmbm5
- Mon Aug 29, 2022 9:51 am
- Forum: Equipment Exchange
- Topic: Mitutoyo M Plan Apo HR 5x
- Replies: 5
- Views: 1690
Mitutoyo M Plan Apo HR 5x
This could possibly be a very good deal for someone. I've dealt with dy-global before, and always had satisfactory transactions in the past.
David
www.ebay.com/itm/204078393152
David
www.ebay.com/itm/204078393152
- Sun Nov 14, 2021 6:23 pm
- Forum: Equipment Discussions
- Topic: Mitutoyo M Plan APO HR 5X 0.21 Test Results
- Replies: 149
- Views: 16519
Re: Mitutoyo M Plan APO HR 5X 0.21 Test Results
If you're talking about half-pixel shift then yes, greatly diminished aliasing. That sort of shifting does not change the MTF curves as computed here, but it does double the sampling frequency so it doubles the Nyquist limit. It also reduces sampling variability by putting 4 samples per cycle at wh...
- Sun Nov 14, 2021 12:47 pm
- Forum: Equipment Discussions
- Topic: Mitutoyo M Plan APO HR 5X 0.21 Test Results
- Replies: 149
- Views: 16519
Re: Mitutoyo M Plan APO HR 5X 0.21 Test Results
The one downside to the NA 0.21 objective is that it provides a lot more opportunity for aliasing, if the subject contains fine detail that resolves above the Nyquist limit of the sensor. The beauty of Nikon's rule is that it guarantees no aliasing, because it matches the cutoff frequency of the ob...
- Wed Nov 10, 2021 9:35 am
- Forum: Equipment Discussions
- Topic: Mitutoyo M Plan APO HR 5X 0.21 Test Results
- Replies: 149
- Views: 16519
Re: Mitutoyo M Plan APO HR 5X 0.21 Test Results
Another comparison for those who (like me) trust their eyes more than graphs and charts. Mitty 10 vs Mitty 7.5 @5X on sensor. 100% crops. Again, the higher NA objective shows clear advantage. I doubt the 5X HR would do much better than the 7.5X @5X, but it would be nice to see a comparison. - Macre...
- Tue Nov 02, 2021 12:21 pm
- Forum: Equipment Discussions
- Topic: Mitutoyo M Plan APO HR 5X 0.21 Test Results
- Replies: 149
- Views: 16519
Re: Mitutoyo M Plan APO HR 5X 0.21 Test Results
You can definitely borrow it, but the credit should go to Mitutoyo!RobertOToole wrote: ↑Tue Nov 02, 2021 12:16 pm
Can I borrow this for my page, with credit of course?
Best,
Best regards,
David
- Tue Nov 02, 2021 8:05 am
- Forum: Equipment Discussions
- Topic: Mitutoyo M Plan APO HR 5X 0.21 Test Results
- Replies: 149
- Views: 16519
Re: Mitutoyo M Plan APO HR 5X 0.21 Test Results
Another strange one? A friend checked with Mitutoyo once for me, he is in the industry, and he said that the HR models are only made to order, and take 3 to 6 weeks once ordered, at least that is what he contact said. That seems strange to me. Best, Robert Well, your friend appears to be right (at ...
- Sun Oct 31, 2021 4:09 pm
- Forum: Equipment Discussions
- Topic: Mitutoyo M Plan APO HR 5X 0.21 Test Results
- Replies: 149
- Views: 16519
Re: Mitutoyo M Plan APO HR 5X 0.21 Test Results
Hello Robert,
Thank you for conducting and publishing these clear and comprehensive tests. The performance of the Raynox DCR-150 with the Mitutoyo HR 5x is especially impressive!
Best regards,
David
Thank you for conducting and publishing these clear and comprehensive tests. The performance of the Raynox DCR-150 with the Mitutoyo HR 5x is especially impressive!
Best regards,
David
- Sat Oct 30, 2021 4:55 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Marine amphipod: Iphiclides minuta
- Replies: 6
- Views: 1057
Re: Marine amphipod: Iphiclides minuta
Beautiful image!
- Tue Oct 19, 2021 10:29 am
- Forum: General Discussion Forum and Community Announcements
- Topic: Olympus' 2021 Global Image of the Year
- Replies: 2
- Views: 1400
Olympus' 2021 Global Image of the Year
A heads up for anyone that may be interested:
https://www.olympus-lifescience.com/en/ ... ioty-2021/
https://www.olympus-lifescience.com/en/ ... ioty-2021/