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02-09-2013, 09:39 PM   #16
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Awaiting the arrival of the Tripod Foot which was confirmed to ship Wednesday, 02/06. There just sin't enough support on the little tripod receptacle when using a long lens. I couldn't get anything even remotely acceptable using a beanbag rest, so .....

QuoteOriginally posted by monochrome Quote

I wonder . . . . .
"no wonder.... just do" Yoda.

The 180 could be a lot of fun. Most likely, won't achieve times lifesize magnification. The long focal length needs a lot of extension for that. You have all those fabulous 50's that would get there. Something to try indoors during the winter months.

Thanks
barondla


Last edited by monochrome; 02-11-2013 at 09:52 AM.
02-09-2013, 10:15 PM   #17
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Think the Q will be useful at extreme magnifications. Pro microscope people are using it. Check out lmscopedotcom. They have a reveiw of the Q ( sent a few corrections their way). They have a picture of the Q on a stereo Zeiss microscope.That can't be cheap.
thanks
barondla
02-10-2013, 06:33 AM   #18
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QuoteOriginally posted by barondla Quote
Check out lmscopedotcom.
Interesting stuff. I haven't found any mention of the Q -- where is it? Also, this statement from them:

QuoteQuote:
If microscope photos of extraordinary high quality are important to you, then you should always choose a digital SLR camera with a full-frame sensor. It should be mentioned, however, that cameras with a half-frame sensor or a four-thirds chip can also provide very good results.
02-10-2013, 08:54 AM   #19
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They review different cameras for microscope use. Try lmscope.com/produkt22/pentax_q_on_microscope_en.shtml.

I googled Pentax Q on microscope to find this and a Zeiss company site. The lmscope site clearly shows and talks about the Q on their Zeiss microscope. The Zeiss site says the Q won't fit. Oops Zeiss.


They show the Q next to a C mount microscope camera. It is smaller than the Q. The review wishes for some things like lcd mag for precise focus. Contacted them with the correct info. Interesting they are are using C mount microscope cameras when dslr/mirrorless cameras are so available. They were very excited by the interval shooting built into the Q.
More to explore with the Q!
thanks
barondla

"Every sensor crops the world."

02-10-2013, 09:05 AM   #20
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Ah, found it (file name is case sensitive):

Pentax Q - Tiny camera with interchangeable lens mount on microscope

Thanks for sending them corrections.
02-10-2013, 09:13 AM   #21
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My question about the Q for 2:1 and beyond is the degree to which the extra resolution (roughly 3x) is countered by diffraction. I suspect it may turn out to be a wash, at best.
02-10-2013, 09:58 AM   #22
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Diffraction could be a problem. If it is why do they make C mount cameras for microscopes? With DSLRs available for less than $500 can't imagine the C mount cameras go for less. I don't know what aperture microscopes work at.

Wonder if they will try the Q again and update the review? I have an Olympus stereo microscope purchased years ago that needs repair. Need to put it on the list to do.
thanks
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02-10-2013, 01:21 PM   #23
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QuoteOriginally posted by barondla Quote
I don't know what aperture microscopes work at.
I gather that the effective aperture of at least some microscope objectives is quite fast -- f/2 according to one report on one particular objective. f/2 on the Q should allow up to 3x or perhaps a bit higher with good results.

02-11-2013, 09:53 AM   #24
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Awaiting the arrival of the Tripod Foot which was confirmed to ship Wednesday, 02/06. There just sin't enough support on the little tripod receptacle when using a long lens. I couldn't get anything even remotely acceptable using a beanbag rest, so .....
QuoteOriginally posted by barondla Quote
"no wonder.... just do" Yoda.

The 180 could be a lot of fun. Most likely, won't achieve times lifesize magnification. The long focal length needs a lot of extension for that. You have all those fabulous 50's that would get there. Something to try indoors during the winter months.

Thanks
barondla
02-12-2013, 08:58 AM   #25
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Dug out my reverse ring, and put a M 50/2 on it for some grab shots.
Slid back and forth on the table to focus.
f/5.6
800 ISO




Nothing great, but looks like I'll be playing around at both ends of the spectrum, and everything in between.
02-12-2013, 09:06 AM   #26
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Great captures ... I need to play with my thrift shop bellows ... J
02-12-2013, 09:48 AM   #27
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QuoteOriginally posted by robtcorl Quote
Dug out my reverse ring, and put a M 50/2 on it for some grab shots.
Looks promising. A bit of CA, but about the same as what I saw with the M50/1.7 reversed on the Q.
02-12-2013, 04:36 PM   #28
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This is my adaption of bellows on a Q
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02-12-2013, 04:41 PM   #29
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QuoteOriginally posted by ChrisJ Quote
This is my adaption of bellows on a Q
A D-mount bellows -- what a great idea!
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