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Thread: Pentax K10D

  1. #1
    stnami
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    Pentax K10D

    I read Sean's call on the Pentax, pretty spot on, though I do think the 21 pancake has way too much distortion particulary close up.

  2. #2
    Administrator, Instructor Guy Mancuso's Avatar
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    Re: Pentax K10D

    Great i will have to read that.
    Photography is all about experimentation and without it you will never learn art.

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  3. #3
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    Re: Pentax K10D

    I want one.

  4. #4
    Subscriber Member Jonathon Delacour's Avatar
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    Re: Pentax K10D

    Quote Originally Posted by Maggie O View Post
    I want one.
    Although I've been seriously considering the K10D for a long time, I now find myself wanting one less and less.

    In his K10D review, Sean mentions focusing problems with the 21mm pancake (a criticism I've read elsewhere). stnami's remark about distortion (particularly close-up) is troubling, since I'd been thinking of the 21, 31, and 43 as the primary lenses I'd buy for the K10D. I'm looking forward to reading Sean's take on the 21 pancake (which I'd hoped to use close up, as I do without problems with my GRD).

    I was also disappointed by Sean's review of the 43mm f/1.9 which, although a full-frame design, exhibits (what I would regard as) severe vignetting and softness in the corners at wide apertures -- on an APS-C sensor! Perhaps my expectations are unrealistic but, reading recent reviews and user experiences of the Olympus 7-14, 11-22, & 12-60 zooms and the 14-24 & 24-70 Nikon zooms, a lot of the gloss has gone off the Pentax primes.

    Obviously the Olympus and Nikon zooms are significantly more expensive (as well as being bulkier and heavier) than the Pentax primes but sharpness and even illumination to the corners even wide open seem a reasonable tradeoff for size and weight (for the kinds of pictures I want to make with an SLR).

    I guess I'll hold off making a final decision until the K20D is announced at (or before) the PMA show in January but at the moment, like Sean's wife, I've narrowed it down to either an Olympus E-3 and a Nikon D300. And that ain't an easy choice!

  5. #5
    Sean_Reid
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    Re: Pentax K10D

    Quote Originally Posted by stnami View Post
    I read Sean's call on the Pentax, pretty spot on, though I do think the 21 pancake has way too much distortion particulary close up.

    Thanks Imants. I haven't actually reviewed the 21 Pancake yet but that's coming up in January. I think that the K10D, though certainly not perfect, is one of the great bargains among DSLRs.

    Cheers,

    Sean
    Last edited by Sean_Reid; 29th December 2007 at 03:37.

  6. #6
    Sean_Reid
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    Re: Pentax K10D

    Quote Originally Posted by Jonathon Delacour View Post

    I was also disappointed by Sean's review of the 43mm f/1.9 which, although a full-frame design, exhibits (what I would regard as) severe vignetting and softness in the corners at wide apertures -- on an APS-C sensor! Perhaps my expectations are unrealistic but, reading recent reviews and user experiences of the Olympus 7-14, 11-22, & 12-60 zooms and the 14-24 & 24-70 Nikon zooms, a lot of the gloss has gone off the Pentax primes.
    Hi Jonathon,

    That resolution board is pretty ruthless. In normal use, I was actually quite impressed with the 43 Pancake. Most lenses are a bit soft in the corners wide open and virtually all compact lenses (SLR or RF) also show a bit of vignetting wide open. The vignetting from the Pentax 43 is quite mild.

    The Zeiss ZK lenses are in a league of their own (among K/KA mounts) but the 43 is definitely a lens I'd own if I had a K10D.

    Cheers,

    Sean

  7. #7
    stnami
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    Re: Pentax K10D

    K100D 21mm pancake, raw file converted no pp ......all I wanted to do was park a 21 (32mm) on a camera at 400-1600iso at f8...but not with this distortion



    Last edited by stnami; 29th December 2007 at 04:10.

  8. #8
    Administrator, Instructor Guy Mancuso's Avatar
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    Re: Pentax K10D

    That is quite a bit it looks like . It could be corrected but like any software program that just adds more work to the mix.

    Although you could actually create a action in PS3 with the lens conversion filter and apply it to those images. that would take some sting out of the extra work involved. Here i tried it at plus 10 but your going to have to crop from here
    Photography is all about experimentation and without it you will never learn art.

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  9. #9
    Subscriber Member Jonathon Delacour's Avatar
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    Re: Pentax K10D

    Quote Originally Posted by Sean_Reid View Post
    That resolution board is pretty ruthless. In normal use, I was actually quite impressed with the 43 Pancake. Most lenses are a bit soft in the corners wide open and virtually all compact lenses (SLR or RF) also show a bit of vignetting wide open. The vignetting from the Pentax 43 is quite mild.
    The Zeiss ZK lenses are in a league of their own (among K/KA mounts) but the 43 is definitely a lens I'd own if I had a K10D.
    Sean, point taken! The various (non-test) images that accompany the review clearly illustrate why you'd include the 43mm in a K10D kit.

    Unfortunately, the list of upcoming reviews that you sent out at the end of last month doesn't include the Zeiss 28mm f/2. This is the lens I would most like to use on a K10D/K20D or a Nikon D300 (for the same reason that people are excited about the 40mm adapter for the GRD/GRD2).

    In your reviews of the 50mm f/1.4 and 35mm f/2 Zeiss lenses, you didn't mention having any focusing problems. Yet this page on the Zeiss website contains the following warning:
    If you ever tried to use classical lenses with manual focus with a digital or analog SLR camera you’ll know the problem: The standard focusing screens of modern auto focus SLR cameras are designed to show a bright, brilliant viewfinder image. Most of them, however, are lacking optical focusing aids (e.g. split/microprism screens). That makes it hard to visually judge sharpness.

    However, precise and reliable focusing is required to fully utilize the capabilities of the Carl Zeiss ZF-lenses. ZF-lenses can be attached to all camera housings with F-bayonet mount; on Canon EOS camera models, for example, using an adapter. Therefore, if ZF-lenses are used on auto focus cameras, Carl Zeiss recommends giving particular attention to the focusing screen used.
    According to Ray, in this thread on the new Cosina Voigtlander SL II 40/2 and 58/1.4 lenses:
    Quote Originally Posted by harmsr View Post
    I have also found the D300 "rangefinder" focus light on the D300 much more accurate than on the D200. If you always go from close to far on the focus when using manual lenses on this body, you will nail the focus when the focus light just goes solid.
    and
    Quote Originally Posted by harmsr View Post
    I was initially concerned that I would need to change the screen in my D300 like I did in the D200. However, the D300 screen and focus system is better. This lets me focus even wide open and fairly close with the Zeiss ZF 25, 35, & 50. It is not precise enough to nail focus wide open with the 85 1.4 ZF.
    It seems reasonable to assume that if focusing is fine with the Zeiss 25/2.8 and 35/2 lenses on the D300, then the 28/2 would also be OK. Still, I'd be interested in any comments you might have about manually focusing the Zeiss lenses on the K10D. Thanks...

  10. #10
    Sean_Reid
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    Re: Pentax K10D

    Quote Originally Posted by Jonathon Delacour View Post
    Still, I'd be interested in any comments you might have about manually focusing the Zeiss lenses on the K10D. Thanks...
    Hi Jonathan,

    Unfortunately, the 35 and the 50 were the only ZK lenses available to review yet. As I mentioned in the review, though, I found that the screen on the K10D made it fairly easy to manually focus the Pentax and Zeiss lenses by eye.

    Cheers,

    Sean

  11. #11
    stnami
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    Re: Pentax K10D

    This should make a few sit up and be counted.............with all those old primes

    http://stock-photo.blogspot.com/2007...-pma-2008.html

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  12. #12
    Sean_Reid
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    Re: Pentax K10D

    Hi Imants,

    That is fantastic news. Pentax deserves attention and this will help them get it. I still have three Pentax mount lens reviews to finish as I get caught up.

    BTW, the author says:

    "The only backwash is the lens market that is still weaker on choice that the other brands."

    That's mistaken. He's overlooking the fact that only Pentax and Nikon are fully compatible with those superb Zeiss primes, some of the best SLR lenses made by anyone at any price.

    If the K20D moves flash exposure comp. to being a direct control, my wife may want a Pentax system for next year's weddings.

    Cheers,

    Sean

  13. #13
    stnami
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    Re: Pentax K10D

    .....as well as the two voigtlanders




    http://www.chiifcameras.com/content/view/40/57/
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  14. #14
    Sean_Reid
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    Re: Pentax K10D

    That's right, those two as well. The Pentax is a great body for traditional MF lenses.

    Cheers,

    Sean

  15. #15
    Subscriber Member Jorgen Udvang's Avatar
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    Re: Pentax K10D

    The rumour all over the net is that the K20D is 14 or 15MP, a Samsung CMOS chip. The premature announcement on a Norwegian website a few days ago said 14MP for the Samsung version. It's also said to have ISO up to 6400.

    I guess that it won't be the king of high ISO with that pixel count, but for some categories of photographers who don't necessarily depend on high ISO, this will be a very interesting camera. I have no problems seeing myself carrying this and a few Limited primes when I'm travelling. I tried a K10D with the 70/2.4 yesterday, and the only thing I could say was "WOW".

    If Olympus doesn't come up with some good, compact primes very soon, I'm very, very tempted.

  16. #16
    Subscriber Member Jorgen Udvang's Avatar
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    Re: Pentax K10D

    Here are some samples that are supposed to be taken with the K20D. Whatever camera is used, the amount of detail in the ISO 100 photo is rather impressing.

    ht tp://genericrepositoryoffiles.butterfry.net/unverified.possible.k20-gx20/3200iso.jpg

    ht tp://genericrepositoryoffiles.butterfry.net/unverified.possible.k20-gx20/100iso.jpg

  17. #17
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    Re: Pentax K10D

    Can pentax take Leica R lenses with an adapter?

  19. #19
    Sean_Reid
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    Re: Pentax K10D

    I don't think so but check cameraquest.com to check to be sure.

    Cheers,

  20. #20
    Sean_Reid
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    Re: Pentax K10D

    Quote Originally Posted by Maggie O View Post

    Those look promising.

    Cheers,

    Sean

  21. #21
    Subscriber Member Jorgen Udvang's Avatar
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    Re: Pentax K10D

    Technical data for K20D in Russian:

    http://www.pentar.ru/catalog/product...ge-eq-tech.htm

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