Why Pentax is the future for Nikon DX users

Canon version does not have SSM or HSM or motor inside the lens.
Only the Pentax version does.
So I take it that you've never tried the pentax version as well ?
Any correlation between SSM or HSM vs other motor/non-motor on
focusing accuracy ? Some sigma has HSM inside yet its samples are
notorious for focusing problem.
The Pentax version will be released in June. Sigma has its own quality issues, and Tokina just codesigns together. The Pentax version of this lens will be built on the Pentax assembly line with the SMC coating, motor and Pentax quality control. Here are some sample pics with a pre-released example of that lens on a Pentax K10D"

http://nedbunnell.blogspot.com/2007/03/test-photos.html

Look at the large versions and see what you think.

Larry
 
This "wise man" did that back in 2004 and wasted 9 months and a
fair amount of $$$ to find out that P*ntax lens line up counts for
NOUGHT when the auto focus on P*ntax bodies [has NOT changed with
K10D, see the posts on P*ntax forum] does not Auto focus properly
worse with fast lenses, in low light just forget it.
Utter nonsense. I Use Pentax AF for wildlife and it has never failed me. I use "old" cameras as well. Andy Rouse, the wildlife photographer, uses both Canon EOS and Pentax. In his latest book he says his Pentax MF camera AF gives him just as many keepers as the EOS 1's.
 
I thought I read that Tokina was making the 16-50 for Pentax
No. Tokina was (is?) making Nikon lenses; some of the long telephotos. Pentax have basically sold a construction to Tokina. This makes for cheaper Pentax lenses.
 
They can't even get a DSLR to auto focus, they have been working on
it since 2004.
They have been working on it since the mid/late 70's. Pretty amazing from the company who made the first AF SLR in 1981.
Try to put AF sensor on the subject next time mate...
 
I use equivalents because that's the only way you can make a direct
comparison. After all, I could pull out a 300mm f/4 and compare it
to the 300mm f/2.8, both on 35FF, couldn't I? That's essentially
the same as pulling out a DX 200mm f/2.8 to "match" a 35FF 300mm
f/2.8.
Certainly not. You buy telephoto lenses to get a certain magnification or reach. Then you choose the speed you need. You can easily compare a 200/2.8 DX with a 300/2.8 FF. Thats real life. The DOF difference is small and, besides, the very shallow DOF is more of a problem for most users than it is desirable.
 
They can't even get a DSLR to auto focus, they have been working on
it since 2004.
They have been working on it since the mid/late 70's. Pretty
amazing from the company who made the first AF SLR in 1981.
Try to put AF sensor on the subject next time mate...
I believe he said DSLR as in a particular Pentax he once owned and not SLR (film). I seriously doubt if Pentax made a DSLR in 1981.
--
Stan ;o()



In the spirit of Occam’s Razor one should embrace the less complicated formulation or simply put, less is more.
 
Look at the large versions and see what you think.
They look good, but so are tokina 50-135 samples that I've seen on the net. Those however, don't tell how good the AF will perform in real life. With MF I can get sharp pics everytime, switch back to AF - and erratic results came back. I still don't think SSM/HSM will help on this particular focus problem, but I really hope it was early production glitch as its build and IQ was top notch.
 
Look at the large versions and see what you think.
They look good, but so are tokina 50-135 samples that I've seen on
the net. Those however, don't tell how good the AF will perform in
real life. With MF I can get sharp pics everytime, switch back to
AF - and erratic results came back. I still don't think SSM/HSM
will help on this particular focus problem, but I really hope it
was early production glitch as its build and IQ was top notch.
Well, who knows. That blog and those pics are by the Pentax VP of marketing testing the actual pre-release lens. If he finds a focus problem, I'm sure he will get it solved with his engineers before release in June.

I guess its moot, as you won't be buying a Pentax camera anyway. Hopefully the Tokina built versions get better.

Larry
 
2 lenses out of how many though?

Those lenses have come out for the APS-C size yes, but they are 2 wide lenses. Pros demanded them when the firs D1 came out and though it took a few years Nikon responded. These 2 pro lenses do not make a dedication to the smaller sensors. They can simply be a stop-gap until Nikon comes out with a FF. Look at their Pro body line up until now. Do you honestly think that pros would have stayed with only 3rd party options for that wide of lens? (with the exception of the like of 14mm primes etc)

The main difference between the 2 is that Pentax will have a MUCH harder time going FF in the future than Nikon. If that happens. However as the poster said, Pentax is aiming ultra high pixel counts and max quality where it should be, in the Med. Format size.

--
K10D+LBA=no$$$ but happy
Over 250K DSLR actions and counting
 
Since Tokina makes the Pentax lenses, Nikon users can buy the
Tokina equivalents.
You can't buy the ones I want, like that 70mm, or the normal "pancake".

--
Normally, a signature this small can't open its own jumpgate.

Ciao! Joe

http://www.swissarmyfork.com
 
hey stan, from my perspective everything looks straight with your son. i predict no major problems!

got an email address?

--
-Justin

'I've found it has little to do with the things you see and everything to do with the way you see them.'
Elliott Erwitt
 
what makes you think that DX lenses won't work on a body with a
35mm sensor?
unlike canon's EF-S lenses, nikon DX lenses will mount on any
F-mount camera, be it a 35mm camera or a nikon DSLR. the DX lens
may not give enough coverage for a 35mm-sized sensor, but there's
no reason to believe that future 35mm-sensor nikon DSLR's won't
have a DX crop function simillar to the D2X's high speed crop. your
DX lenses will function exactly as they were designed to function.
I think the fact that DX lenses will mount on a 35mm sensor camera
is a rather weak argument. I'm not impressed by the DX crop
function either. At best, this function can be described as using
half of what you paid for. Worse, you'll need an obscene MP count
on the 35mm sensor if the DX crop shall come even close to todays
industry standard of 10MP. I just don't see many photographers
using their 12-24mm DX on a future 35mm body.
If you want to use the Full Frame sensor with the DX lens....you can always use a TC. That's what I plan to do with my DX lens when I they come out with FF body.
 
this doesn't make sense to me -- I think you're ignoring the crop factor.

On a small P&S super zoom, you have 300mm equiv (albeit at say f/3.5 on a Canon S2/S3) but the front element of the lense isn't 85mm.

so on a DX, the equiv of 200 is 133 -- so your math should for the "200 f2.8" be 133/2.8 and so it does matter whether its DX or not. Basically one of the promises of smaller sensors is the ability for smaller lenses.
200 divided by 2.8 = 71.4 -- that is the millimeter size required
for the front element. Doesn't matter if you call it DX or not.

300 divided by 4 = 75 -- that is the millimeter size required for
the front element. Doesn't matter if you call it DX or not.

Get my point? You can't just create a small lens because you want
to. The size is determined by the focal length to maximum aperture
ratio.
 
If he finds a focus problem, I'm sure he will get it solved with his
engineers before release in June.
well ... looks like you'd have to wait a bit longer:
http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=22998021
I guess its moot, as you won't be buying a Pentax camera anyway.
Hopefully the Tokina built versions get better.
Guess what, I now have k100d and sorely missed my d50. I even prefer crippled d40kit's focusing accuracy (not to mention sharpness). Good to hear that pentax camera works for you ... but I'd rather stick with my nik.
 
Pentax AF is simply lousy, I had all that "fun" before moving to Nikon, Pentax AF has NOT changed at all since the *istD, slow, innacurate and the slightest sign of low light ah just forget it, so the quality of their lenses just doesn't matter.
If he finds a focus problem, I'm sure he will get it solved with his
engineers before release in June.
well ... looks like you'd have to wait a bit longer:
http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=22998021
I guess its moot, as you won't be buying a Pentax camera anyway.
Hopefully the Tokina built versions get better.
Guess what, I now have k100d and sorely missed my d50. I even
prefer crippled d40kit's focusing accuracy (not to mention
sharpness). Good to hear that pentax camera works for you ... but
I'd rather stick with my nik.
--
Inspector Kluso
 

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