Search found 88 matches

by billjanes1
Tue Sep 12, 2017 3:16 pm
Forum: Equipment Discussions
Topic: Nikon D850 focus step size at 1:1 magnification
Replies: 20
Views: 7414

Re: Nikon D850 focus step size at 1:1 magnification

Dear Bill, Has this body an electronic shutter ? Yes, it does. However flash synch options are uncertain. Bill By my understanding, the camera is a DSLR with Mirror and Mechanical shutter. However, Nikon has enabled a fully-electronic shutter that operates only when the camera is in Live View mode....
by billjanes1
Tue Sep 12, 2017 11:43 am
Forum: Equipment Discussions
Topic: Nikon D850 focus step size at 1:1 magnification
Replies: 20
Views: 7414

Re: Nikon D850 focus step size at 1:1 magnification

pierre wrote:Dear Bill,

Has this body an electronic shutter ?
Yes, it does. However flash synch options are uncertain.

Bill
by billjanes1
Tue Sep 12, 2017 11:40 am
Forum: Equipment Discussions
Topic: Alternatives to an Optical Breadboard?
Replies: 17
Views: 2480

William over at Wemacro has a really nice vertical stand for $100 that is hard to beat for convenience & cost. It's quite sturdy and takes up little space, and even comes with a coarse X&Y subject positioner. http://www.wemacro.com/?product=vertical-stand Best, Mike The price is attractive but ship...
by billjanes1
Mon Sep 11, 2017 9:29 am
Forum: Equipment Discussions
Topic: Nikon D850 focus step size at 1:1 magnification
Replies: 20
Views: 7414

Ray, According to the online D850 manual, page 212, it supports AF-S and AF-P lenses. Not sure if this means only Nikon lenses or 3rd party lens too. Best, Mike I interpret this to indicate that the microstep auto focus stacking is supported only with the AF-S and AF-P lenses which have a built in ...
by billjanes1
Mon Sep 11, 2017 5:58 am
Forum: Equipment Discussions
Topic: Nikon D850 focus step size at 1:1 magnification
Replies: 20
Views: 7414

Nikon D850 focus step size at 1:1 magnification

Leonard Sheppard was fortunate enough to obtain a Nikon D850 and performed a focus stack at a magnification of approximately 1:1 with the smallest step size of 1 with the 105 mm VR. He took 30 shots covering a distance of about 4 mm, giving a step size of 0.133 mm. According to Rik's DoF table, the ...
by billjanes1
Wed Aug 30, 2017 8:28 pm
Forum: Equipment Discussions
Topic: Nikon D850 Specs are Official
Replies: 35
Views: 4931

Bill, My note about manual exposure is that you don't need to read out the sensor to get the exposure, it's set manually. Thus you just use a long exposure and trigger the flash sometime during the long exposure, the key here is to let the flash be pretty much the only light that exposes the image....
by billjanes1
Wed Aug 30, 2017 4:22 pm
Forum: Equipment Discussions
Topic: Nikon D850 Specs are Official
Replies: 35
Views: 4931

Older Nikon SLR bodies with full electronic shutters, the D50, D70 etc, could sync flash up to 1/4000th sec. no problem. Robert As I recall the D70 was CCD with a global electronic shutter. As far as I know, global electronic shutters are not available in CMOS dSLRSs, although some high end CMOS mo...
by billjanes1
Wed Aug 30, 2017 3:17 pm
Forum: Equipment Discussions
Topic: Nikon D850 Specs are Official
Replies: 35
Views: 4931

Seems Nikon finally listened to some of the users and incorporated a few of those requests!! Will be interesting to see how the silent shutter and flash work together, soon we shall see :D Best, Mike I don't think that flash will work very well with the electronic shutter, since the readout time to...
by billjanes1
Wed Aug 30, 2017 8:52 am
Forum: Equipment Discussions
Topic: Nikon D850 Specs are Official
Replies: 35
Views: 4931

Seems Nikon finally listened to some of the users and incorporated a few of those requests!! Will be interesting to see how the silent shutter and flash work together, soon we shall see :D Best, Mike I don't think that flash will work very well with the electronic shutter, since the readout time to...
by billjanes1
Sat Aug 26, 2017 10:53 am
Forum: General Discussion Forum and Community Announcements
Topic: Is Nikon intending to abstract the esence of focus stacking?
Replies: 83
Views: 19742

It's not a camera issue, but no, ZS doesn't accept Raw. Helicon sort-of does, but wouldn't you prefer to use your favourite Raw >Tiff processing program? Stacking time in ZS depends on MP, not file size. My new fast-ish but not unusual PC should stack PMax at about 12-15 frames of 45MP per minute. ...
by billjanes1
Sun Jul 23, 2017 6:30 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Strange Artifact with DMAP
Replies: 7
Views: 2000

Very interesting! I was afraid it was something like that. I suggest touching base with the support people at Helicon. Perhaps they've seen it before. --Rik I will do that. The mis-ordering of the images was suggested by the observation that the artifact was present with DMAP but not PMAX. I would ...
by billjanes1
Sat Jul 22, 2017 5:58 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Strange Artifact with DMAP
Replies: 7
Views: 2000

OK, I took a detailed look at the 17-frame stack. Focus order there is quite weird. Starting in frame 001, focus moves up the target page in 002, stays almost unchanged in 003, moves down a hair in 004, then progressively up in frames 005 though 008. In img_009 it jumps down again, farther up in 01...
by billjanes1
Sat Jul 22, 2017 2:00 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Strange Artifact with DMAP
Replies: 7
Views: 2000

I cannot remember a problem like this ever being reported before. The EXIF data shows that this was shot with a Nikon D3 using 105 mm f/2.8 lens at f/5.6, with an exposure time of 1/125 second. Is that correct? If so, then I cannot think of any reason why there would be periodic defocusing of the i...
by billjanes1
Tue Jul 18, 2017 4:38 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Strange Artifact with DMAP
Replies: 7
Views: 2000

Strange Artifact with DMAP

Today I was doing depth of field focus step to check for focus banding and noted a strange banding artifact with DMAP and also with Helicon using metohod 2 (depth map). After some experimenting I think I found the cause. The stack was takin under florescent illumination using magnetic ballast and li...
by billjanes1
Tue Jul 18, 2017 8:14 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Ant Face
Replies: 8
Views: 1178

Sharks, Your photos are wonderful and your setup is ingenious. Is the base of the system a metal breadboard or merely some type of plywood covered with a dark fabric. Thanks, Bill I use a carbon fiber covered wood cutting board. :) Thanks Much cheaper than a metal optical breadboard. The do it your...