Search found 181 matches

by Davids
Sun Jan 19, 2020 7:44 am
Forum: Equipment Discussions
Topic: Schneider APO Digitar 120mm 1x and Tube Lens Test
Replies: 10
Views: 1561

Thanks for your work, as usual, Robert! I own the APO digitar 120 and absolutely love it. Your stacked results continually tempt me to try purchasing a Componon 35 or 28 and giving it a go with the Fuji GFX sensor. I have only found these for sale on Edmund Optics new for just shy of $1000. Were you...
by Davids
Tue Oct 08, 2019 12:18 pm
Forum: Equipment Discussions
Topic: Found a dealer for the SK Micro-Symmar 2.8/50mm !
Replies: 11
Views: 784

Thank you for sharing that slide, Robert. That is definitely something to take into consideration. Also, the working distance of 31mm may bit a bit limiting but to be expected with a focal length of 50mm. If I were adept at testing I'd ask the dealer to send both the micro-symmar and the xenon-sapph...
by Davids
Mon Oct 07, 2019 8:33 pm
Forum: Equipment Discussions
Topic: Found a dealer for the SK Micro-Symmar 2.8/50mm !
Replies: 11
Views: 784

Robert,

I may also be confused, but I do think the MTF is for 3.5x. The way I interpret it is 1/magnification=0.29. This works out since 1/3.5 =.29 , though I could be interpreting this all wrong!
Now, why they have MTFs for f’=2.3 and 2.5 when the lens is listed at 2.8 is beyond me!
by Davids
Mon Oct 07, 2019 8:10 pm
Forum: Equipment Discussions
Topic: Found a dealer for the SK Micro-Symmar 2.8/50mm !
Replies: 11
Views: 784

Robert, your results are quite impressive! I do wonder what type of image circle your lenses can cover. What intrigued me so much about the micro-symmar is it’s ability to cover a large image circle (though I do agree, the dataSheet seems a bit off). Chris, here are the quotes: Xenon-Sapphire 4.5/95...
by Davids
Mon Oct 07, 2019 6:45 pm
Forum: Equipment Discussions
Topic: Found a dealer for the SK Micro-Symmar 2.8/50mm !
Replies: 11
Views: 784

Found a dealer for the SK Micro-Symmar 2.8/50mm !

The Schneider-Kreuznach Micro-Symmar 2.8/50mm is no longer listed on the SK website and as far as I knew the lens was discontinued. I contacted a dealer of line scan lenses about pricing for the Xenon-Sapphire line and to my surprise they told me that they can in fact still get the Micro-Symmar! The...
by Davids
Fri Oct 04, 2019 6:52 pm
Forum: Equipment Discussions
Topic: Schneider Xenon-Diamond
Replies: 6
Views: 817

SK contacted me saying that the 1.5/82 is discontinued. What a shame. Maybe it will emerge on the used market at some point. Excuse my ignorance Ray, but what are "TB" and "AE"?
by Davids
Wed Oct 02, 2019 4:11 pm
Forum: Equipment Discussions
Topic: Schneider Xenon-Diamond
Replies: 6
Views: 817

Schneider Xenon-Diamond

I've been thinking more about higher magnification lenses for large sensors and my search always brings me back to the Schneider Xenon-Diamonds. Initially I was looking at the Xenon-Diamond 2.2/117mm which is optimized for 3.5x with an image circle of 62.5 and Schneider notes that it can even cover ...
by Davids
Sun May 19, 2019 4:25 pm
Forum: Equipment Discussions
Topic: What Lenses for 55mm Diagonal Sensor?
Replies: 11
Views: 2941

John, I don't think you can go wrong with either. Both are extremely well made and both have a good reputation. The Actus has some nice additions, including a stepper motor that can be attached to the rear standard so you can move your sensor with a stackshot or other step software. You wont get nea...
by Davids
Sun May 19, 2019 12:41 pm
Forum: Equipment Discussions
Topic: What Lenses for 55mm Diagonal Sensor?
Replies: 11
Views: 2941

Greetings John! I also have a GFX and use an Arca-Swiss Universalis II, but the Actus looks like a fine machine. My current lenses for macro are: Schneider Macro apo-digitar 120/5.6 which has good performance from .25x to ~4x, but you will need a considerable amount of extension. The image circle is...
by Davids
Thu Jan 17, 2019 9:43 am
Forum: Equipment Discussions
Topic: New lens company and APO macro lens
Replies: 7
Views: 3068

New lens company and APO macro lens

Some of you may have already seen this, but there's a new lens company out of Switzerland, NWS-Instruments, who will be producing a 110mm APO Macro lens. They will start a Kickstarter campaign within the next few months. You can check out the lens specs in the link below. http://www.nws-instruments....
by Davids
Thu Jan 10, 2019 9:01 am
Forum: Equipment Discussions
Topic: Developing a color profile and proper white balance
Replies: 9
Views: 3476

Pardon my ignorance, but how would you use the target to create a profile within lightroom? For example, something like x-rite color checker has it's own Lightroom plugin that can recognize the target in an image and create a profile for that photograph. I contacted x-rite and they said that their s...
by Davids
Wed Jan 09, 2019 6:40 pm
Forum: Equipment Discussions
Topic: Developing a color profile and proper white balance
Replies: 9
Views: 3476

Developing a color profile and proper white balance

Sometimes I struggle with getting the right colors from my macro work. I know that there are a number of products available, such as the x-rite color checker, that allow you to create an accurate color profile for the scene being imaged. But how could I use something like that for my macro work? Wel...
by Davids
Mon Jan 07, 2019 6:28 pm
Forum: Equipment Discussions
Topic: Schneider Micro-Symmar 2.8/50 - Any experience?
Replies: 11
Views: 3112

After seeing results from the last few tests I ran I am not sure what to expect. Have a feeling there is a lens combo out there that would beat the inspec.x L due to the modest effective aperture. Robert Agreed -after seeing the incredible results you're getting with these stacked combinations, I d...
by Davids
Mon Jan 07, 2019 2:00 pm
Forum: Equipment Discussions
Topic: Schneider Micro-Symmar 2.8/50 - Any experience?
Replies: 11
Views: 3112

Ha! You've got it, Robert! What's the harm in a little credit card debt?? Also, at least they were direct with you. One can only imagine what "extremely expensive" means if the "cheaper" alternative was $22,000. It's a shame that this lens is discontinued and hard to find - there really isn't much a...
by Davids
Mon Jan 07, 2019 10:27 am
Forum: Equipment Discussions
Topic: Schneider Micro-Symmar 2.8/50 - Any experience?
Replies: 11
Views: 3112

I contacted SK and the lens is discontinued and only available as a "special order" with a minimum purchase order of 50 units. So....who's in? ;)