Search found 1656 matches

by RobertOToole
Tue May 26, 2020 11:36 am
Forum: Equipment Discussions
Topic: Etendue Mejiro lenses on eBay now
Replies: 41
Views: 4589

A little late here and this might have been mentioned but I have some V38 adapter into up on my site in a few places, these are two: https://www.closeuphotography.com/schneider-makro-symmar-sr-120 https://www.closeuphotography.com/schneider-apo-componon-60mm-f4-test Some of my SK and no-name adapter...
by RobertOToole
Sat May 23, 2020 6:43 pm
Forum: Equipment Discussions
Topic: Etendue Mejiro lenses on eBay now
Replies: 41
Views: 4589

There are two versions OTO and OTH N. I have one of each and spec sheets for both. Both are excellent. Do you mean OTH and OTH N? I know of the OTH (90mm) and the newer OTH F/V (92.7mm, 93.7mm) versions, with F standing for fixed aperture and V for variable. Barrels look different between the two, ...
by RobertOToole
Fri May 22, 2020 7:31 pm
Forum: Equipment Discussions
Topic: Nikon Rayfact VF Float Lens Test Preview
Replies: 22
Views: 2528

These two are going to be very interesting!: Rayfact VF vs Scheider APO-Componon 4/60 + Makro-Symmar 5.9/120 at 2.0x on Nikon D850 Rayfact VF vs Scheider Componon 2.8/35 Makro Iris at f/2.8 + Scitex S-3 110 at 3.0x on Nikon D850 One comment before I get back to processing raw files :D One pair was ...
by RobertOToole
Fri May 22, 2020 7:16 pm
Forum: Equipment Discussions
Topic: Etendue Mejiro lenses on eBay now
Replies: 41
Views: 4589

Thanks. I found the post: https://www.photomacrography.net/forum/viewtopic.php?t=41083&highlight=Mejiro+90mm The V-Mount is SK V-38 compatible as long the adapter has enough depth. I have a few Thorlab 52mm tubes. I have to consider Robert's internal mount method. Eric This is the most flexible way...
by RobertOToole
Fri May 22, 2020 7:13 pm
Forum: Equipment Discussions
Topic: Etendue Mejiro lenses on eBay now
Replies: 41
Views: 4589

chris_ma wrote:I have a pdf with detailed MTF and distortion curves of this series from somewhere, if somebody needs them send me a PM.

There are two versions OTO and OTH N.

I have one of each and spec sheets for both.

Both are excellent.
by RobertOToole
Fri May 22, 2020 6:59 pm
Forum: Equipment Discussions
Topic: Etendue Mejiro lenses on eBay now
Replies: 41
Views: 4589

This is one of my favorite tube lenses of all! :D I do have the spec sheet for them, I own the 1x and 0,75x versions. Both are superb and not a bad 1x taking lens either, results are here: https://www.closeuphotography.com/1x-test-2020 Anyone curious I can pull the spec sheets. I really should post ...
by RobertOToole
Fri May 22, 2020 6:53 pm
Forum: Equipment Discussions
Topic: Nikon Rayfact VF Float Lens Test Preview
Replies: 22
Views: 2528

Nikon Rayfact VF Float Lens Test Preview

http://www.photomacrography.net/forum/userpix/3062_RayfactVF05x3xlineScanLensCloseupPhotographycomnew_1.jpg Just taking a break from processing images but I wanted to share a quick preview to the test: Rayfact VF 91.7mm vs. SK Macro Varon CAS 85mm vs. Mejiro Float 4/110 Also even though I had my ha...
by RobertOToole
Fri May 22, 2020 6:30 pm
Forum: Equipment Discussions
Topic: Cheap objectives: are they worth buying?
Replies: 13
Views: 1928

I have two Lomo 3.7x objectives, and one was better than the other, but in that case both were very good, even the "less good" one was still very good. Hi Lou, for best results I recommend stacking the Lomo 3,7x. :D FYI, just in case, I posted something years ago, this is the post on my site: https...
by RobertOToole
Sat May 16, 2020 9:34 am
Forum: Equipment Discussions
Topic: Schneider Componon 35mm f4 4/35 Lens Test Online
Replies: 32
Views: 4824

dickb wrote:
RobertOToole wrote:BTW, I have a big test I'm working on this weekend BTW that should be interesting to everyone, 1-3x. Looking forward to it. I'll post some info soon! :D
Sounds fascinating - if there is any proofreading that needs doing let me know.
Will do thanks!

:)
by RobertOToole
Fri May 15, 2020 4:51 pm
Forum: Equipment Discussions
Topic: Schneider Componon 35mm f4 4/35 Lens Test Online
Replies: 32
Views: 4824

Thanks for the link JKT, I didn't know about that shop before. Easier too for me that they are in the EU . Here we have to pay 25% tax on the value of the product and the shipping + a $10 fee for the customs declaration per shipment if it comes from outside the EU. Getting an adapter ring or two th...
by RobertOToole
Fri May 15, 2020 12:26 pm
Forum: Equipment Discussions
Topic: Schneider Componon 35mm f4 4/35 Lens Test Online
Replies: 32
Views: 4824

JKT wrote:Would one of these do the trick combined with step-down ring?

https://www.customphototools.com/macro/ ... e-adapters
Yes. I have a couple from them and they do the trick. They are a little thicker than I would like they the machining quality is A-okay.

Best,

Robert
by RobertOToole
Fri May 15, 2020 12:25 pm
Forum: Equipment Discussions
Topic: Schneider Componon 35mm f4 4/35 Lens Test Online
Replies: 32
Views: 4824

Hi Bakwetu, "- The CPN 4/35 and CPN 2.8/35 share optics. " This is intriguing, are the older equivalent in the optics to the latest version (2.8/35) and will they perform the same at say f4 or at 2.8 (with modded iris for the 4/35 then of course)? I cannot tell the difference in performance between ...
by RobertOToole
Thu Apr 16, 2020 1:27 pm
Forum: Equipment Discussions
Topic: Schneider Componon 28mm f/1.9 Iris Upgrade and more
Replies: 10
Views: 2577

Just checked, there are images and some hints and tips about swapping the housings on both pages, the 4/28 and 4/35: https://www.closeuphotography.com/schneider-componon-35mm-f4-lens-test https://www.closeuphotography.com/schneider-28mm-f4-lens-test Not sure if you have looked at the pages. If the l...
by RobertOToole
Thu Apr 16, 2020 1:16 pm
Forum: Equipment Discussions
Topic: Schneider Componon 28mm f/1.9 Iris Upgrade and more
Replies: 10
Views: 2577

Re: Upgrade Details

Hi Eric I recently acquired a Schneider 50mm f/4 enlarge lens in the B00 iris mounts. I'd like to do this iris mount transplant with my Schneider 28mm f/4 to create a f2.0. I've never dismantled a lens other than replacing a shutter on a view camera lens. I have the proper tools and I've watched a n...
by RobertOToole
Sat Mar 07, 2020 1:30 pm
Forum: Equipment Discussions
Topic: shared reference silicon wafer for comparisons
Replies: 139
Views: 17928

Macro_Cosmos wrote: I found another candidate:
Image

Just checked and I do have this one, its 12 inches across!

I think I paid something like $25 for a dozen various twelve inch wafers and one of this type was included.

Best,

Robert