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[quote name='Klaus' timestamp='1295339362' post='5604']
That's not really a problem.
[/quote]
Well, it would be with the D3x. However, the camera is probably special in this regard ...
-- Markus
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genotypewriter
Unregistered
[quote name='Klaus' timestamp='1295127442' post='5559']
Well, it's way beyond normal testing parameter. We can provide reliable tests till 400-500mm maximum. Beyond it's a gamble.
[/quote]
Watch out for those cars <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />
anyscreenamewilldo
Unregistered
[quote name='arv' timestamp='1295164290' post='5566']
. . . . Most interesting would be to look at well PP images <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='
' />.
[/quote]
- you called?
![[Image: rolleyes.gif]](http://forum.photozone.de/public/style_emoticons/default/rolleyes.gif)
. . . yes i know, i'm off with the pixies, but i can't help looking in from time to time -
so . . . someone else's 500 mirror, so light and compact for carrying around - two points of view =
- smoothie bg -
![[Image: 1160580847_KdCu9-O.jpg]](http://goingdown.smugmug.com/photos/1160580847_KdCu9-O.jpg)
- but on the other hand here is the honourable henry heron- after me getting fat eating all those donuts -
![[Image: 1160578334_h4nc4-O.jpg]](http://goingdown.smugmug.com/photos/1160578334_h4nc4-O.jpg)
- and before pigging out -
![[Image: 1160578182_jL2HG-O.jpg]](http://goingdown.smugmug.com/photos/1160578182_jL2HG-O.jpg)
Hi Klaus
I'm very interesting to this test because I have this lens
and I'm not pretty happy with its performance although I knew -prior
buying it- that I would normally expect quite mediocre results and I have
tried hard to get usable results. Thus, I'm curious what results
you'll get from your side as also as the quality of the sample photos.
The key is to have a very stable tripod, Mup, wireless triger and
super-extremely careful focusing.
This lens is able to focus very close thus you can use the imatest chart
for resolution testing but I believe that close focus is not its strong
point and the results will be disasterous. I believe its best performance is around
300 meters away.
I would be interesting to see whether the T-mount adapter makes any difference
regarding its space from the sensor, given that the focusing ring has a lot of space
past infinity in order somebody to use a quite thicker T-mount to increase
sensor distance from the lens.
I find that the best use for this lens is videography which does not require
much resolution from a lens but the 800mm focal length is wow for some
video applications e.g. sunset, wildlife, moon.
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[quote name='dimitris' timestamp='1295361382' post='5624']
This lens is able to focus very close thus you can use the imatest chart
for resolution testing but I believe that close focus is not its strong
point and the results will be disasterous.
[/quote]
On full frame, the test distance would be 32 meters (40 x focal length). Even more on APS-C, of course. So, not really "close focus" (what's the MFD of this lens?).
-- Markus
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[quote name='mst' timestamp='1295362324' post='5625']
On full frame, the test distance would be 32 meters (40 x focal length). Even more on APS-C, of course. So, not really "close focus" (what's the MFD of this lens?).
-- Markus
[/quote]
We can't really go too close anyway because we have to keep a certain quality level on the chart in relation to print pixel magnification.
genotypewriter
Unregistered
[quote name='anyscreenamewilldo' timestamp='1295353829' post='5616']
so . . . someone else's 500 mirror, so light and compact for carrying around - two points of view =
- smoothie bg -
[/quote]
That Sony/Minolta 500 AF is a very good lens. Wish Sony's low light was as good as Canon's or Nikon's.
GTW
