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Replied in luminous-landscape
http://www.luminous-landscape.com/reviews/cameras/fuji_x_pro1_launch.shtml
Berl.
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Replied in A Question About Actual Sub 2.0 Micron Pixel Pitch Camera Models
Apart from bogusly measuring better in reviews and tests.
Maybe that is the reason.
Berl.
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Replied in manual focus question
I remember my Nikon f2 + 50 or 55 mm was in DOF at full open diaphragm.
to take a sharp photo at blind set to infinity.
If hope the DOF scale on the focus ring is accurate
maybe only older...
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Replied in manual focus question
I down't know about modern lenses that also can auto focus.
I have it over old manual short prime lenses Nikon Canon Leica etc.
If you turn the focus to the infinity stop the focus aid micro...
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Replied in manual focus question
I like the old manual focus because I can turn the focus ring to infinity blind.
where it stops.
this was my method with standard lenses F2.0 50mm etc.
Can focus by wire this also?
Berl.
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Replied in Legacy glass
If you put normal SLR legacy super width angle glass on it is very good
because of it is not to close to the sensor.
Berl.
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Replied in Maybe a complaint count.
Maybe a complaint count.
And a ignore count.
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Replied in It was removed because it was meaningless
What factor?
Berl.
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Replied in What plastic is used for Camera lens mount?
What plastic is used for Camera lens mount?
Is it better to tell the chemical name nylon polypropylene etc?
Because there are very strong plastics and not so plastics.
Can somebody calculate...
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Replied in Theoretical Minimum aperture or f-stop.
I mean the number on the diaphragm ring on a lens
4.0 2.8 2.0 1.4 1.0 0.95 etc as I use in a store as I buy a lens.
I say wrongly then have you a F2.0 lens for me.
In the calculations I Use...
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Replied in Theoretical Minimum aperture or f-stop.
Theoretical Minimum aperture or f-stop.
Can some experts explain why aperture can not get smaller than 0.5.
According to this formula it can be very small for microscopy objectives.
In a dry...
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Replied in Minimum F ...
I have had in the past a dry NA 0.95 objective. [...] F-number must be much smaller than 1:0.5.
sorry for copy 1:0.5 from your text
must be 2.8 2.0 1.4 1.0 0.7 0.5 etc.
as on the lens...
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Replied in Minimum F ...
I have had in the past a dry NA 0.95 objective.
One Source of Many
See Plan Fluorite Correction dry NA 0.9 objective
http://www.microscopyu.com/articles/optics/objectiveproperties.html
F...
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Replied in Can someone calculate
Can someone calculate
The force to pull a screw out of brass VS lens mount plastic.
Berl.
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Replied in Minimum F ...
A numerical aperture of 0.5 is the same as a photographic aperture of f/1 (for a lens used in air). And lower numerical apertures mean slower lenses, not faster.
Every body with a microscope...
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Replied in Minimum F ...
Microscopic objective's can have F number much smaller than 0.5
You can recalculate the NA aperture to F number for a dry Objective
I have calculated it before.
I was also wondering what...
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Replied in Will never happen
DSLR (excluding mirrorless):
Canon 43.7%, Nikon 41.4%, Pentax 7.3%
Does that figure include Sony non flapping mirror cameras?
Berl.
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Replied in 2011 Camera Market Shares in Japan
DSLR (excluding mirrorless):
Canon 43.7%, Nikon 41.4%, Pentax 7.3%
Does that figure include Sony non flapping mirror cameras?
Berl.
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Replied in Noise Ninja and A77.
Some noise reduction programs use auto profile.
for example.
http://www.focusforensic.shorturl.com/
Berl.
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Replied in No trick - and not meant for judging noise pattern
Thanks very nice test.
But what ISO was used.
And was there cropping?
Berl.
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