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shared reference silicon wafer for comparisons
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lothman



Joined: 14 Feb 2009
Posts: 418
Location: Stuttgart/Germany

PostPosted: Mon Feb 24, 2020 4:16 pm    Post subject: Reply with quote

List of interested members:
1x Angal
3x Macro_Cosmos
1x JoeD
1x Dolmadis
2x dmillard
2x JohnDownie
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Smokedaddy



Joined: 07 Oct 2006
Posts: 1680
Location: Phoenix, Arizona

PostPosted: Mon Feb 24, 2020 4:35 pm    Post subject: Reply with quote

I purchased a slide from this seller a couple years ago, can you tell me 'exactly' which slide we're talking about?

Regards,
-JW:
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Lou Jost



Joined: 04 Sep 2015
Posts: 4261
Location: Ecuador

PostPosted: Mon Feb 24, 2020 5:01 pm    Post subject: Reply with quote

I had already made arrangements with Chris_ma to get one, so I will join the club of "havers" even though I'm not on lothman's list.

This is going to be very good, not only for testing our lenses and objectives but also for fine-tuning our set-ups. We'll all know exactly how our results compare to anyone else's.
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mawyatt



Joined: 22 Aug 2013
Posts: 2452
Location: Clearwater

PostPosted: Mon Feb 24, 2020 5:20 pm    Post subject: Reply with quote

Lothar,

That is so kind and generous of you to do this, thanks so much!!

Although I'm not qualified as a lens expert, tester and evaluator I could use a common test chip/wafer to evaluate how my setup is doing and if improvements are in order, especially since I could compare against what the lens experts have.

If you have enough test chip/wafers and it's not too much extra trouble please include me for 1 test chip/wafer.

Again, thanks so much for helping.

Best,
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Smokedaddy



Joined: 07 Oct 2006
Posts: 1680
Location: Phoenix, Arizona

PostPosted: Mon Feb 24, 2020 5:39 pm    Post subject: Reply with quote

Oops, I have that slide, sorry about that, so I don't need one. We discussed that slide here a long time ago, interesting it popped back up again. Just a heads up I purchased two of them back then and both were very dirty and one had smudges all over it. I noted that back in that old message thread here.
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ChrisR
Site Admin


Joined: 14 Mar 2009
Posts: 8520
Location: Near London, UK

PostPosted: Mon Feb 24, 2020 7:02 pm    Post subject: Reply with quote

A generous offer of work!
Count me in for one, please Smile.
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houstontx



Joined: 31 Jul 2015
Posts: 297

PostPosted: Mon Feb 24, 2020 10:54 pm    Post subject: Reply with quote

I would like to purchase one, is payment via paypal alright? I am in California.

Looks like I could use this as a SEM resolution slide. It is just a decapped IC right? Is it mounted on glass?

Please pm your paypal email or I can send to another member and pay for extra shipping, whatever is easiest for you.

Thanks!
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Macro_Cosmos



Joined: 15 Jan 2018
Posts: 628
Location: Sydney

PostPosted: Mon Feb 24, 2020 11:59 pm    Post subject: Reply with quote

Alright, got 2 on board. One of them wants 3 copies.
So mine +3+1, 5.
Since we have 20, there might be enough. If not, I'm happy to let go of the friend's 2 copies, leaving him with 1.

Thanks!
MC
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lothman



Joined: 14 Feb 2009
Posts: 418
Location: Stuttgart/Germany

PostPosted: Tue Feb 25, 2020 1:45 am    Post subject: Reply with quote

Update 25.2.: List of interested members:
1x Angal
5x Macro_Cosmos
1x JoeD
1x Dolmadis
2x dmillard
2x JohnDownie
2x RobertO'Toole
1x mawyatt
1x ChrisR
2x houstonx (changed to 2x)
1x ChrisS

notes:
- please correct me if I forgot somebody
- payment will be possible via Paypal
- 19 orders so far, I think there are some more available than the 20 I mentioned- it is this version
https://www.bw-optik.de/restposten/testpraeparat/316/testpraeparat


Last edited by lothman on Wed Feb 26, 2020 3:37 am; edited 2 times in total
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JKT



Joined: 28 Oct 2011
Posts: 126
Location: Finland

PostPosted: Tue Feb 25, 2020 8:14 am    Post subject: Reply with quote

I ordered directly, so the stock is getting depleted fast.
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houstontx



Joined: 31 Jul 2015
Posts: 297

PostPosted: Tue Feb 25, 2020 10:53 pm    Post subject: Reply with quote

Well in that case could I purchase two? Lothman I will PM you. thanks
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lothman



Joined: 14 Feb 2009
Posts: 418
Location: Stuttgart/Germany

PostPosted: Wed Feb 26, 2020 3:43 am    Post subject: Reply with quote

Update 26.2.: List of interested members:
1x Angal
5x Macro_Cosmos
1x JoeD
1x Dolmadis
2x dmillard
2x JohnDownie
2x RobertO'Toole
1x mawyatt
1x ChrisR
2x houstonx (changed to 2x)
1x ChrisS
1x khw

notes:
- I ordered 20 chips yesterday
- payment will be possible via Paypal
- I will contact you via the forum if everything has arrived and tell you your individual price.
- 20 orders so far, all Chips are sold ;-) - it is this version
https://www.bw-optik.de/restposten/testpraeparat/316/testpraeparat
- beside this action I ordered another set of small chips which I will add for free, those will be this version
https://www.ebay.de/itm/100pcs-Toshiba-TB31261AF-RF-Bi-CMOS-900Mhz-cordless-phone-silicon-dies-wafer/113743175642?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

Until everything has arrived and is packed it will take at least a week so please be patient with me.

best regards
Lothar


Last edited by lothman on Wed Feb 26, 2020 12:33 pm; edited 1 time in total
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Smokedaddy



Joined: 07 Oct 2006
Posts: 1680
Location: Phoenix, Arizona

PostPosted: Wed Feb 26, 2020 11:03 am    Post subject: Reply with quote

Does anyone know what this represents and/or how to read them?





-JW:
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chris_ma



Joined: 22 Mar 2019
Posts: 212

PostPosted: Thu Feb 27, 2020 9:47 am    Post subject: Reply with quote

the sample I ordered two weeks ago arrived, did a quick test.

pretty poor lighting setup and room for improvement, but here for what it's worth.

100percent center crop, M about 0.9x to 1x on a S1R with pixelshift, and single bayer pattern.
lightroom with 0 sharpening and 200% upres with photoshop CC 2020

couldn't upload it to the forum because a warning that even 350kb jpegs are over the file size limit, so here the dropbox links. best to download since dropbox compresses the previews, or otherwise watch them at 100% zoom:
https://www.dropbox.com/s/eotjwbjv9un1825/wafer-v001-pixelshift-100p-crop.png?dl=0
https://www.dropbox.com/s/ofcb18qm28mwj36/wafer-v001-bayer-200p-crop.png?dl=0

my take away:
for fine patterns pixel shift is a huge improvement, on simple structures the debayer works pretty well.[/img]
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chris
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chris_ma



Joined: 22 Mar 2019
Posts: 212

PostPosted: Thu Feb 27, 2020 10:15 am    Post subject: Reply with quote

managed to upload a compressed version after all:

pixelshift:


bayer:


I should mention that the bayer image is from on of the 8 shots that make up the pixel shift image, so focus etc is completely identical.

pretty cool target, it doesn't fully cover fullframe on 1:1 though
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chris
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