Search found 47 matches

by chuong nguyen
Tue Aug 18, 2020 1:28 pm
Forum: Equipment Discussions
Topic: Zeiss S-Orthoplanar 60mm f4 vs Minolta 5400 at 2X
Replies: 0
Views: 1282

Zeiss S-Orthoplanar 60mm f4 vs Minolta 5400 at 2X

I recently finished adapting this rare lens to the Sony A7R II for general photography. This adaption allows focus from 1:3 to infinity. Lens details is here: http://www.macrolenses.de/ml_detail.php?ObjektiveNr=78 by Dr. Klaus Schmitt. After one week of testing, I must say that the sharpness and smo...
by chuong nguyen
Sun Jul 12, 2020 6:00 pm
Forum: Equipment Discussions
Topic: Test wafer distribution: Many features, includes res chart
Replies: 80
Views: 14354

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

The chip came to California in two long pieces. Not ideal but workable. Thanks for the time and efforts.

Chuong Nguyen
by chuong nguyen
Sun Jun 07, 2020 12:12 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: weevil 5x (high resolution)
Replies: 8
Views: 1478

Nice. Must be lots of pre/post cleanup. Thanks for sharing.
by chuong nguyen
Wed May 27, 2020 1:26 pm
Forum: Equipment Discussions
Topic: Polyvar Dic system questions.
Replies: 13
Views: 2815

I have a nice Polyvar MET that I've been slowly cleaning up and still working on it, so it is a work in progress. I have disassembled the MET and cleaned the internals. The aftermarket Semprex stage needed a small gear and a couple other small items that were damaged while in transit. I have spoken...
by chuong nguyen
Thu May 21, 2020 3:10 pm
Forum: Equipment Discussions
Topic: Etendue Mejiro lenses on eBay now
Replies: 41
Views: 4267

I just got one, 2 left.

Thanks Lou,

Chuong
by chuong nguyen
Thu May 21, 2020 10:31 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Prosopocera lactator
Replies: 7
Views: 1161

Sooo clean. :shock:

Chuong Nguyen
by chuong nguyen
Wed May 20, 2020 10:02 pm
Forum: Equipment Discussions
Topic: Amazing Wafer Stepper Setup
Replies: 20
Views: 1691

ray_parkhurst wrote:I have perhaps a silly question regarding coverslips...for high NA objectives which require them, how critical is their position between subject and front of lens? You can probably figure out why I ask the question...
I glued a Zeiss coverslip on the objective permanently. I works great.

Chuong
by chuong nguyen
Wed May 20, 2020 9:31 am
Forum: Equipment Discussions
Topic: Amazing Wafer Stepper Setup
Replies: 20
Views: 1691

Thanks for sharing. I noticed the use of the objective that has been discussed here in the forum with no cover glass.
Image
by chuong nguyen
Thu May 14, 2020 8:56 pm
Forum: Equipment Discussions
Topic: Zeiss S Planar 25 1.6 micro lithography lens reversed
Replies: 10
Views: 963

Scarodactyl wrote:Impressive! How are working distance and color correction?
The WD for these massive lenses from Zeiss Jena is about 1.5 mm.

This was taken with LED light.

Image
by chuong nguyen
Thu May 14, 2020 11:28 am
Forum: Equipment Discussions
Topic: Zeiss S Planar 25 1.6 micro lithography lens reversed
Replies: 10
Views: 963

The e-line of mercury was the main wavelength for the Ultra-Micro-Nikkors and early Zeiss. Several years ago Chuong posted the results of another Zeiss e-line stepper lens, but using white light. I was surprised that it was not too bad even with white light. But the 436nm and 405nm lenses seem to d...
by chuong nguyen
Thu May 14, 2020 11:15 am
Forum: Equipment Discussions
Topic: Zeiss S Planar 25 1.6 micro lithography lens reversed
Replies: 10
Views: 963

Chuong, From what Marco comments, this optic must have been produced at the beginning of the series, that is, approx. In 1974, ... about half a century! At that time, Zeiss West, Zeiss East (DDR), Nikon produce E-line lens for lithography. They are all better that Mitu 10 in visible light. Well, a ...
by chuong nguyen
Wed May 13, 2020 9:56 pm
Forum: Equipment Discussions
Topic: Zeiss S Planar 25 1.6 micro lithography lens reversed
Replies: 10
Views: 963

I love these lenses. I see the pixel dimensions are 16000 x 12000. Was this a pixel-shifted image, or did you shift the whole lens+camera, or did you shift the sensor, or did you use a medium format sensor? The camera/lens was shifted for a 2x2 stitched image. This lens has a IC of 80 mm. So I coul...
by chuong nguyen
Wed May 13, 2020 8:39 pm
Forum: Equipment Discussions
Topic: Zeiss S Planar 25 1.6 micro lithography lens reversed
Replies: 10
Views: 963

Zeiss S Planar 25 1.6 micro lithography lens reversed

This 5X8mm PSC circuit on a wafer vintage 1987 was photographed using the earlier version of the S-planar 25mm 1.6. Resolution is impressive. http://www.photomacrography.net/forum/userpix/1872_Zeiss_Wafer_BW_1200pix_1.jpg Lens Zeiss S-Planar 25mm 1.6. Design lighting 5460 e-line; Actual lighting: gr...
by chuong nguyen
Thu May 07, 2020 6:12 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Asia Murder Hornet
Replies: 8
Views: 1584

Hello: an impressive image!!. Out of curiosity: how does the Nikon Coolscan 800 behave vs the Nikon Rayfact 95mm f2.8? Could you show the setup to make the Rayfact telecentric? The best Ramon, I prefer the coolscan 800 for 1X and the Rayfact for 2X in telecentric mode. Here is my setup for the shot...
by chuong nguyen
Wed May 06, 2020 8:22 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Asia Murder Hornet
Replies: 8
Views: 1584

Asia Murder Hornet

This hornet has been in the news lately.

https://www.easyzoom.com/image/195761/a ... ode=manage

Rayfact 95 f2.8, Telecentric.
Sony A7R II
2X 150 images stacked in ZereneStacker
Single Cineo Matchbox light

Image