Search found 2488 matches

by mawyatt
Wed Dec 17, 2014 9:40 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Silicon Chip Images
Replies: 42
Views: 4980

Gem, As you can see the wirebonds are reflective, as is the chip surface and sides. The QFN package base is also highly reflective, you can see the wirebond shadows in the base. With a more direct light source these shadows become very pronounced and don't look nice. You can remove them post process...
by mawyatt
Wed Dec 17, 2014 9:32 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Silicon Chip Images
Replies: 42
Views: 4980

Gem, This was done with an early lens setup but with the dual light tents and strobes with diffusers. I am trying to post more images but something is blocking it. I have better examples with later techniques and some with solder balls. I even tried creating another thread "More chip images" but cou...
by mawyatt
Wed Dec 17, 2014 8:55 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Hard Drive Read / Write Head
Replies: 17
Views: 2526

You won't, if you stick to the "forum etiquette"! Posting your own image and asking for help with it which you did, should be done in your own thread rather than someone elses. As I suggested, you can make links between threads. You can also post an image in another's thread with prior permission f...
by mawyatt
Wed Dec 17, 2014 8:40 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: More chip images
Replies: 0
Views: 584

More chip images

This is a chip I found in the lab, it's beat up and the solder balls mangled and very oxidized (un-oxidized looks like a spherical mirror). I have some really good images of our proprietry chips with un-oxidized solder balls, but can't show them to the general public...sorry. For some reason I can't...
by mawyatt
Wed Dec 17, 2014 8:27 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Silicon Chip Images
Replies: 42
Views: 4980

Silicon Chip Images

I started this thread at the request of the moderators to show some image of chips I am working on and how I have progressed. These are silicon chips we and other design. I started out with a Nikon 105 on extension tubes, and tried some lens magnifies you place on the front of the lens. The results ...
by mawyatt
Wed Dec 17, 2014 7:31 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Hard Drive Read / Write Head
Replies: 17
Views: 2526

Rylee - Yes, I had a whole room full of computer stuff but I had to be ruthless and scrap it all! People give me a lot of stuff to fix too. The view is on the end of the arm - the platter fits between the 'pickup coils' - they are sprung together. Mike - You're welcome - I wondered where your image...
by mawyatt
Tue Dec 16, 2014 5:55 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Hard Drive Read / Write Head
Replies: 17
Views: 2526

mawyatt wrote: The black paper mask , was that on the objective barrel and/or on the lens front? How many stacks did you use? The hard drive shot was a stack of 19, and the paper is around the barrel and on the end of the objective as in this picture... http://i1021.photobucket.com/albums/af333/mrm...
by mawyatt
Tue Dec 16, 2014 9:25 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Hard Drive Read / Write Head
Replies: 17
Views: 2526

Thanks Mawyatt... I used a low powered LED ring light with vellum paper diffuser - a black paper mask on the end of the objective to stop it reflecting any light, and a small white card reflector above to put a bit more light in the top. I checked the lighting a couple of times on the computer befo...
by mawyatt
Mon Dec 15, 2014 6:06 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Hard Drive Read / Write Head
Replies: 17
Views: 2526

Beautiful image Steve!! What lighting did you use?
by mawyatt
Sun Sep 14, 2014 7:13 am
Forum: Equipment Discussions
Topic: Connecting Olympus BH-2 microscope and E-3 DSLR
Replies: 57
Views: 10548

Regarding exposure vibration, I use a Nikon so don't know if this applies to Canon or Olympus. I use strobes that fire just before the rear curtain closes. The sequence is: move camera/lens, wait, flip mirror, wait, open front curtain wait for programmed exposure time, then fire strobes and close re...
by mawyatt
Sun Aug 31, 2014 7:16 am
Forum: Equipment Discussions
Topic: 100mm or 200mm prime lens versus Raynox as a tube lens
Replies: 5
Views: 1572

Martin, The D800E is a full frame sensor which would explain the vignetting. Rik has done an evaluation of the Raynox 150 as a "tube" lens for sharpness, and found it to be better than the dedicated Nikon and Thor tube lenses which cost much more. It's somewhere on this site. Anyway for $65 and anot...
by mawyatt
Sat Aug 30, 2014 7:25 am
Forum: Equipment Discussions
Topic: 100mm or 200mm prime lens versus Raynox as a tube lens
Replies: 5
Views: 1572

Re: 100mm or 200mm prime lens versus Raynox as a tube lens

I've seen several discussions about the Raynox versus other tube lenses, but can't find a comparison of it versus the Canon macro 100mm or the Nikon 200mm primes. I have the Canon macro 100mm f2.8 lens and a Nikon 200mm f4 prime and use them as tube lenses with a Nikon 10X infinite objective. I've ...
by mawyatt
Sun Jul 27, 2014 6:00 am
Forum: Beginners Micro
Topic: Adding an objective to a Canon T5i
Replies: 38
Views: 43732

This is flat up against the 70-200, not a cone type. Could this be a problem with my present setup needing more distance from the Mit to the 70-200 front? No -- vignetting is always caused by too much separation, not too little. The problem with some telephotos is that even zero separation is too m...
by mawyatt
Sat Jul 26, 2014 9:35 am
Forum: Beginners Micro
Topic: Adding an objective to a Canon T5i
Replies: 38
Views: 43732

I am using the D800E with a Nikon 70-200 f2.8 as a tube lens for the Mitutoyo M Plan Apo 10 0.28 f200 inf objective. I think this is similar to your setup mentioned above. Do you think I would be better off with the DCR-150 than the 70-200 f2.8? I do see some small vignetting with the 70-200. Is th...
by mawyatt
Sat Jul 26, 2014 6:29 am
Forum: Beginners Micro
Topic: Adding an objective to a Canon T5i
Replies: 38
Views: 43732

May I trouble you please to give me an indication of the length of M42 tubes back to the camera that I might need with an assembly for the DCR 250 and DCR150? Tube sections shown in the photos are 7, 14, and 28 mm. So for the DCR-250 you're looking at 28+28+7 = 63 mm, and for the DCR-150 it's the s...