Search found 595 matches

by dmillard
Tue Jul 16, 2019 3:06 pm
Forum: Equipment Discussions
Topic: Sony A7R IV without focus bracketing?
Replies: 20
Views: 6415

Wow, 16-image pixel shift technology! 240Mp!! If it has focus bracketing I'd sell my Panasonic S1R. Wow is right! Even without focus bracketing (which would be very nice, but I haven't seen it mentioned in any of the announcements), it would provide over 100Mp pixel shift images in APS-C crop mode,...
by dmillard
Mon Jul 15, 2019 6:36 am
Forum: Equipment Discussions
Topic: Piezoelectric focuser on eBay
Replies: 76
Views: 12704

mawyatt wrote: I'm getting ready to order additional components for the entire setup including on boards DC to DC Converter, let me know ASAP if you want the parts and PCB. Best,
I'm very interested in the parts and the PCB. Thank you for investing your energy and insight into this project.
by dmillard
Sat Jul 13, 2019 5:33 pm
Forum: Equipment Discussions
Topic: Rafcamera adapter for 8000/9000ED scanner lens
Replies: 4
Views: 1079

ray_parkhurst wrote:Looks like Raf built more. They are available again on the website linked above.
Thank you for sharing this!
by dmillard
Thu Jul 11, 2019 1:13 pm
Forum: Equipment Discussions
Topic: Piezoelectric focuser on eBay
Replies: 76
Views: 12704

mawyatt wrote: I may roll a custom PCB if enough folks want to participate.
Thanks - please count me in!

Best regards,
David
by dmillard
Wed Jul 10, 2019 6:01 pm
Forum: Equipment Discussions
Topic: Powering flashes via mains
Replies: 13
Views: 1888

I routinely measure the voltage whenever I pick up old Vivitar 283 units, and then I tag them with the value. Most have measured around 9V, but I tested a couple that were well above that. Here's a site that has a schematic, and some suggestions for lowering the triggering voltage, but I've never fo...
by dmillard
Wed Jul 10, 2019 5:54 pm
Forum: Equipment Discussions
Topic: Powering flashes via mains
Replies: 13
Views: 1888

I have been using Vivitar 283 flashes with Vivitar SB-4 power supplies (120V 60Hz 6W) for years on big stacks with no issues. The 4 AA batteries remain in the flash when the SB-4 is connected, but I think their only function is powering the flash ready indicator light. The flash output between disch...
by dmillard
Sun Jun 30, 2019 12:23 pm
Forum: Equipment Discussions
Topic: Laowa introduces 100mm f/2.8 2x Macro APO
Replies: 35
Views: 8809

best packaging I got was from Ffordes and from Thorlabs. On my last order from Thorlabs one package arrived severely dented like it has been dropped from several feet, and I was already worried, but when opening it I saw that they packaged it with perfect custom padding and the inside was completel...
by dmillard
Sat Jun 29, 2019 12:16 pm
Forum: Equipment Discussions
Topic: Panasonic S1R first stack
Replies: 29
Views: 2661

Thanks Lou - that makes a lot of sense. I'm sure you are delighted to have discovered the cause of the issue, and equally pleased that the S1R required no surgery. :D
by dmillard
Sat Jun 29, 2019 10:29 am
Forum: Equipment Discussions
Topic: Panasonic S1R first stack
Replies: 29
Views: 2661

Re: Panasonic S1R first stack

A sharp, fairly fast lens is needed for this mode to work well. For this test I used a Repro-Nikkor 85mm f/1.0, used at f/2.0 and m=1, so with an effective aperture of f/4.0. I'll write more about this amazing lens elsewhere on the forum. Thanks for sharing this Lou - the combination of the lens an...
by dmillard
Tue Jun 25, 2019 6:10 am
Forum: Equipment Discussions
Topic: Seeking:120 to 180mm fl, large (70mm+) coverage ∞ to ~ 1x
Replies: 11
Views: 721

The 150mm f/9 Rodenstock Apo-Ronar and the 180mm f/9 Fujinon A are both good choices, if you don't mind the slow maximum aperture.
by dmillard
Thu Jun 20, 2019 6:18 pm
Forum: General Discussion Forum and Community Announcements
Topic: Robert OToole
Replies: 31
Views: 5659

Robert,

Thank you for the generosity with which you have shared your insights and information.

I hope you have a rapid recovery.

Best wishes,
David
by dmillard
Tue Jun 11, 2019 7:18 am
Forum: Equipment Discussions
Topic: 4X Surprise Lens vs Nikon 4x Plan APO Can you tell the diff?
Replies: 67
Views: 7397

Are the Xenoplans you have that massive? Came across these while searching for the spot filter info. Thanks again for the PDF link. http://www.photomacrography.net/forum/userpix/3062_Screen_Shot_20190610_at_15636_PM_1.png http://www.photomacrography.net/forum/userpix/3062_XNP1423_1.jpg Thank you Ro...
by dmillard
Tue Jun 11, 2019 7:16 am
Forum: Equipment Discussions
Topic: 4X Surprise Lens vs Nikon 4x Plan APO Can you tell the diff?
Replies: 67
Views: 7397

I'm not Robert, but I do have Xenoplans in both CCTV and Compact series variants and also a few of these Fujinons. The Fujinons are massive compared to the Schneiders, the CCTV Xenoplans are reasonably large but relatively lightweight , the compact series are small but very dense. Thanks for the in...
by dmillard
Mon Jun 10, 2019 1:33 pm
Forum: Equipment Discussions
Topic: 4X Surprise Lens vs Nikon 4x Plan APO Can you tell the diff?
Replies: 67
Views: 7397

But not 49mm filter thread. I thought that would help lead people away :D The CCTV Xenoplans have a 49mm thread. Hello Robert, Here's a link to information about Fujifilm's machine vision lenses, and data on what I think may be a CCTV Xenoplan equivalent lens. Are the Xenoplans you have that massiv...
by dmillard
Sun Jun 09, 2019 9:19 pm
Forum: Equipment Discussions
Topic: 4X Surprise Lens vs Nikon 4x Plan APO Can you tell the diff?
Replies: 67
Views: 7397

One last guess - a 25mm Fujinon C-mount lens?