[Klaus]

[quote name='mst' timestamp='1295338020' post='5602']

That was my first thought, too. You'll probably have to find something to replace the tripods with ... something made of concrete comes to my mind <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='' />



-- Markus

[/quote]



That's not really a problem.

[mst]

[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

[genotypewriter]

[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]

[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?



. . . 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 -







- but on the other hand here is the honourable henry heron- after me getting fat eating all those donuts -







- and before pigging out -

[Yakim]

[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]



Ha! Since when you were afraid of a challenge? <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='' /> And afterwards, go for the Minolta/Sony 500/8 AF lens.



Seriously, why not test mirror lenses? Many people are interested in these lenses as cheap telephoto lenses. It'll be nice to see how they really perform.



FWIW, I had a Nikon 1000/8 once and it was very good on my 40D but eventually I got fed up of shooting the moon.



http://www.fredmiranda.com/forum/topic/626335/2



http://photo.net/canon-eos-digital-camera-forum/00ROFu





Go Klaus, Go!

[Guest]

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.

[mst]

[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

[Brightcolours]

[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]

3.5 meters

http://www.syopt.co.kr/eng/product/manual_zoom_800F80mirror.asp

[Klaus]

[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]

[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