Search found 41 matches

by elimoss
Fri Feb 07, 2020 11:14 pm
Forum: Equipment Discussions
Topic: Laowa 2.5-5x vs Raynox MSN 202 +telephoto vs LOM 3.7 on m43
Replies: 9
Views: 1162

Full frame equivalent aperture is applied when the magnification intended for MFT is half that of FF vertically, in order that the MFT image fill the frame in the same way as the FF image. To make a bug fill the frame of an FF image, by comparison to an MFT sensor, I need the bug to take up twice th...
by elimoss
Fri Feb 07, 2020 10:44 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Deconvolution of diffraction/Capture one pro 10
Replies: 11
Views: 6148

Well, this has been informative. It's pretty clear that deconvolution sharpening is just another form of contrast enhancement -- albeit perhaps a smart one -- making informed decisions on the desired manipulations in the frequency domain. So we are left with guessing as the best (only?) way to 'reco...
by elimoss
Tue Jan 14, 2020 10:47 am
Forum: Equipment Discussions
Topic: my positioning stack: X, Y, yaw, pitch
Replies: 43
Views: 5118

I have same problem where I would like to find some base plates or other mechanism for fastening 40mmx40mm and 60mmx60mm stages to breadboard. Any ideas other than the wood block (which is great idea, thanks!)?
by elimoss
Wed Jan 08, 2020 4:32 pm
Forum: Equipment Discussions
Topic: Close-up filters
Replies: 11
Views: 724

If the lens is telecentric on the sensor side, then the angle of light rays through the exit pupil, from the perspective of the sensor, doesn't change much with extension. If the incident light rays don't change, the EA doesn't change. So then it does stand to reason that the increase in diffraction...
by elimoss
Fri Feb 01, 2019 10:18 pm
Forum: Equipment Discussions
Topic: Will I get more resolution/information?
Replies: 65
Views: 10885

RobertOToole wrote: Note that this image has been compressed to be able it to post here so the image will look even cleaner and sharper with less compression.
Hi Robert,
Did you use full electronic shutter for the normal single shot exposure?
by elimoss
Tue Jan 15, 2019 6:12 pm
Forum: Equipment Discussions
Topic: Which camera bodies have fully electronic shutter?
Replies: 39
Views: 10936

I am curious as well why they do not enable the hot shoe when shooting slower than the readout speed.

1/4 second is surely a safe sync speed for ES, so why can't that be enabled?
by elimoss
Sat Dec 22, 2018 2:11 pm
Forum: Equipment Discussions
Topic: Lomo 3.7x Objective Extension vs Stacked Test Images
Replies: 18
Views: 7161

Ever try one of those generic 4x objectives stacked [instead of pure extension]? I'm thinking it might also do pretty well. Maybe not as high res as the Lomo, but the coatings are probably more modern.
by elimoss
Mon Dec 17, 2018 10:18 am
Forum: Equipment Discussions
Topic: A new toy .. "Focus Bracketing"
Replies: 19
Views: 10308

Lou Jost wrote:Yes, Olympus fires the flash in all modes, though the synch speed is slow in electronic shutter modes (including focus bracketing).
Neat. So is focus bracketing mode electronic shutter only, or can you choose mechanical as well?
by elimoss
Mon Dec 17, 2018 9:19 am
Forum: Equipment Discussions
Topic: A new toy .. "Focus Bracketing"
Replies: 19
Views: 10308

Will it fire the flash when using the focus bracketing mode, if you choose to also use flash?

Fuji does not.

Olympus -- not sure

Panasonic might in one it's bracketing modes, but again, I'm not sure.
by elimoss
Fri Dec 14, 2018 9:29 am
Forum: Equipment Discussions
Topic: DiMAGE 5400 sweet spot
Replies: 10
Views: 2966

RobertOToole wrote: BTW just for fun I tried the Minotla 5400 on a tube lens and it was terrible with only the lens center area being sharp.
Interesting.
I tried the 7 element Nikkor Scanner ED on a tube lens and I could not get good results, even with an aperture between the lenses
by elimoss
Fri Dec 14, 2018 9:25 am
Forum: Equipment Discussions
Topic: Lens Tests in Progress Coming Soon 2018
Replies: 25
Views: 5792

The APO-Xenoplan 35mm f1.8 and 17mm 1.4 have small image circles -- do they cover APS-C in stacked configuration?
by elimoss
Sun Dec 09, 2018 5:51 pm
Forum: Equipment Discussions
Topic: Schneider Componon 35mm F2.8 2.8/35 LINE SCAN LENS TEST
Replies: 9
Views: 2808

Is it a given that the Componon should be reversed in this setup, since it is image is being focused on at infinity?
by elimoss
Fri Dec 07, 2018 12:45 pm
Forum: Equipment Discussions
Topic: adventures in flocking
Replies: 5
Views: 1429

Great job.
What kind of adhesive are you using to get it so tidy?
by elimoss
Wed Nov 28, 2018 9:49 pm
Forum: Equipment Discussions
Topic: Makro-Symmar HM 120mm
Replies: 32
Views: 14358

So which lens do you think would perform better in a lens stack? Makro-symmar 1x 120, APO-Digitar Macro 120 1x or APO-Digitar normal 120? Thats the question :D Not sure, but Aperture Mount NK-0 is the device you want in order to use a normal Digitar. This is Schneider's Copal 0 compatible aperture....
by elimoss
Thu Nov 22, 2018 12:03 pm
Forum: Equipment Discussions
Topic: Anatomy, A DIY Precision S & S System (Electronics)
Replies: 7
Views: 4822

Discovering the wonders of VNC is always fun!
Bravo, great work here!