Search found 2488 matches

by mawyatt
Mon Dec 29, 2014 6:56 am
Forum: Equipment Discussions
Topic: D800 Remote trigger
Replies: 25
Views: 3235

A firmware issue is certainly suggested. Another thing to check is that the Focus Mode Selector switch on the camera is set to "M" ("Manual focus"). [I suspect "C" ("Continuous servo autofocus") would also work, but have not checked). The mode you don't want this kind of work is "S" (Single Servo A...
by mawyatt
Mon Dec 29, 2014 6:49 am
Forum: Equipment Discussions
Topic: D800 Remote trigger
Replies: 25
Views: 3235

Check to be sure that your cameras' firmware has been updated. Update 1.10 in May 2014 included this point: In some rare cases, the memory card access lamp remained lit for longer than usual, and some time was required before any operations could be performed. This issue has been resolved. --Rik Th...
by mawyatt
Sun Dec 28, 2014 6:36 pm
Forum: Equipment Discussions
Topic: D800 Remote trigger
Replies: 25
Views: 3235

Chris, All good comments. I have used shutter delay when shooting with strobes with rear curtain strobe trigger and seen the problem. Now I am experimenting with Ikea LEDs instead of strobes, so not using any shutter delay mode and still see effect. I use Lexar 64GB 600X SD card and Lexar 64GB 800X ...
by mawyatt
Sun Dec 28, 2014 12:33 pm
Forum: Equipment Discussions
Topic: D800 Remote trigger
Replies: 25
Views: 3235

Could it be the sensor heating up? Good idea but I don't think sensor heating is the problem, the OOF ribbons seem to appear random in stack location and then after the first occurs then more may or may not appear. I have about 5 seconds minimum between exposures, sometimes 10 seconds and this stil...
by mawyatt
Sun Dec 28, 2014 12:20 pm
Forum: Equipment Discussions
Topic: D800 Remote trigger
Replies: 25
Views: 3235

This is wired trigger I assume, not IR? Suggestion you've probably thought of - reduce the times, one at a time, to see if/where things get noticeably worse.? Yes directly wired to StackShot. Already tried the reverse to extend times to see if problem went away, did not see any correlation even at ...
by mawyatt
Sun Dec 28, 2014 10:25 am
Forum: Equipment Discussions
Topic: D800 Remote trigger
Replies: 25
Views: 3235

Chris, Very annoying indeed!! I have sent a note to Cognisys, but with the holidays haven't received a reply to date. I have a D800 and D800E and they both do this, so it's not unique to my camera. StackShot has a LED that indicates when a trigger command is sent, I have seen this light and the came...
by mawyatt
Sun Dec 28, 2014 8:41 am
Forum: Equipment Discussions
Topic: D800 Remote trigger
Replies: 25
Views: 3235

D800 Remote trigger

I have been having problems with the D800 getting out of sequence on long sessions and causing thin out of focus "ribbons" across the image. On another site a suggestion by oldtigger was made that the camera might be busy causing this. I ran an experiment to try and see if the file type had anything...
by mawyatt
Tue Dec 23, 2014 7:52 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Hard Drive Actuator Arm
Replies: 13
Views: 1849

Steve, Superb image, nice perspective. The hard drive is a wonderful collage of technology; from mechanics, to electronics, to servo systems and even signal processing. These are works of art to the scientific/engineering eye!! Thanks for bringing these images to our attention. Happy Holidays, Mike
by mawyatt
Sun Dec 21, 2014 3:07 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Silicon Chip Images
Replies: 42
Views: 4980

Max,

Never tried this, not sure how it works or what it shows. Guess I'll read Rik's Zerene explanation to see if I can figure this out.

I'll give this a try, please don't chew we up if it's not very good. Any guidance anyone can provide is much appreciated.

Best,

Mike
by mawyatt
Sat Dec 20, 2014 10:20 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Silicon Chip Images
Replies: 42
Views: 4980

IBM has a good size dedicated building in Burlington Vt, it's full of Blue gene supercomputers doing nothing but computing these masks. Makes Watson look like a child????
by mawyatt
Sat Dec 20, 2014 10:11 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Silicon Chip Images
Replies: 42
Views: 4980

Rik, Exactly. The mask set may require 2 or 3 individual masks to get the desired result. This is working the the problem backwards, you must manipulate the problem to produce the correct answer...the pattern in this case. We do this routinely in communications, it's called pre-distortion. The masks...
by mawyatt
Fri Dec 19, 2014 7:40 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Silicon Chip Images
Replies: 42
Views: 4980

One of my colleagues saw this thread and suggested I provide more details about what these images represent for folks that may not be familiar with chip design and processing. First off, these are of silicon chips with minimum feature sizes of 130, 90 and 65nm (nm means nanometer). The 65nm chips ha...
by mawyatt
Fri Dec 19, 2014 8:24 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Silicon Chip Images
Replies: 42
Views: 4980

abpho, Charles,

Thanks.
by mawyatt
Fri Dec 19, 2014 8:23 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Silicon Chip Images
Replies: 42
Views: 4980

Chris,

The pads are on 100 micron pitch I believe (at home now and can't verify by asking someone). We have some that were on 75 micron pitch, but don't think these are images of those chips.
by mawyatt
Thu Dec 18, 2014 7:29 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Silicon Chip Images
Replies: 42
Views: 4980

Here's a couple of highly cropped images of good solder balls. Note the small dimples at the top of the solder balls, this is the result of a wafer/chip probing technique to evaluate the chip performance. Polyimide membrane probes are developed that make electrical contact will all the solder balls,...