TonyBeach wrote:
Well, you can use all the fast FX lenses on DX format (but not the other way around). It changes the AOV, but then there are some DX equivalents such as the Nikkor 35/1.8 DX, Sigma 30/1.4, and the Voigtlander Nokton 58/1.4.
Makten wrote:
Yes, but they aren\'t \"fast\" compared to their FX competitors, since you lose 1.2 stops of light and DOF when using the same aperture on a 1.5x shorter focal length.
MajinHurricane wrote:
This is the reason I\'m going FX.
Well f/2 on DX format is certainly shallow enough for me and actually more than I would like (although the background blur is nice as you open up a lens).
Here is f/4 at 116mm:
Here is f/3.5 at 140mm:
Kerry Pierce wrote:
OTOH, if you desire more shallow DOF or you\'re stopping down a lens only to hit the sweet spot, then the d700 maintains the 1.5 to 2 stops advantage.
...and the \"sweet spot\" doesn\'t change when you want to use a larger image circle for a larger format?
theSuede wrote:
The lens mounted on the D700 can have a MTF that\'s 33% lower than the D300 and still be just as sharp. So, if you want a cleaner picture, stay at the same ISO and increase exposure time, if you want the same shutterspeed - increase ISO, you won\'t get more noiser than the DX picture anyway.
I prefer to see the comparison as \"when I don\'t need stupid amounts of DoF, I get sharper pictures with less noise and hence better, cleaner colours with FX\". If what you shoot is dependent on a certain minimum DoF, then by all means go DX, 4/3 or even compact. In that case you loose nothing (and pay for & carry less equipment!).
Of course, for my purposes I want that extra MTF when I get a \"D700x.\" The other consideration though that I alluded to in my response to Kerry is that edge performance of the lens also has to be taken into consideration -- you may have to stop down an extra stop to get those two even.
JHerr wrote:
I think that this thread needs to be resolved. I think that the argument here is worthy of a test! Someone should test it and give hard evidence, and make another thread that shows proof and answers the question for everyone.
As they say, the proof of the pudding is in the eating. For my part, I\'m enjoying my recently acquired Nikkor 10.5/2.8 fisheye very much:
It works great on my IR converted D200 too:
Jun 18, 2009 at 09:59 PM
Previous versions of TonyBeach's message #7208061 « d300 to d700 or not??? »
