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06-13-2009, 02:29 PM   #1
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DA 300 mm f/4 ED [IF] SDM OR FA* 400mm f/5.6 ED IF

Hi all

For this two lenses, are the IQ the same ?

Between this two lens witch one would you get for the k20d ? Why ?

Thanks in advance

( Edit: Sigma EX 50-500mm f/4,0-6,3 DG Pentax AF aka BIGMA can also be considered even if I don't like the weight , any other lens suggestions with similar focal length are welcome )


Last edited by netuser; 06-13-2009 at 02:37 PM.
06-13-2009, 02:41 PM   #2
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What's your budget?
06-13-2009, 02:59 PM   #3
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QuoteOriginally posted by Erasmo Quote
What's your budget?
I was checking again the sigma specs and it's out of the question ... too heavy.

DA 300 f4 is the one I can get at a really better price.
FA* 400 would cost me more 500/600 euros than the DA 300
06-14-2009, 07:40 AM   #4
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I tried today the Canon EF 400mm f/5,6 L USM on the 40D body and made some great shots.


Besides the focal lenght I also liked the silent/speed of the ultrasonic motor.

taking into consideration my initial question, which one should I get ? DA ? FA ?

DA seems not long enought, FA seems not to fast focus since it doesn't have SDM and it's noisy ... noise is not very good for birds

Please advice.

Thanks


Last edited by netuser; 01-27-2010 at 03:52 AM.
06-14-2009, 08:31 AM   #5
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I can vouch for the capabilities of the DA* 300mm F4. I got to try it out at the Henry's show a while back. The fact that you can make out every pore and little hair on someone's face at 20-30 paces away, wide open, through the viewfinder ought to say enough about the sharpness. It may not be the extra 100mm long, but it's sharp enough that 100% crops are certainly not out of the question. Also keep in mind that, with a good teleconverter, you've got a 600mm F8!
06-14-2009, 08:43 AM   #6
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600mm F8 is not that useful when shooting birds at early morning like the ones I did above
06-14-2009, 10:24 AM   #7
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DA300 with a teleconverter?
06-14-2009, 10:28 AM   #8
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DA 300 + 1.5tc = 450mm f5.6 = 50mm more reach at same speed

06-14-2009, 10:34 AM   #9
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The FA* 400 lens on k20d would give focal view of +/- 550/600mm right ? Does this mean also DA* 300 will give +/- 450mm focal view on k20d ?
06-14-2009, 10:44 AM   #10
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QuoteOriginally posted by netuser Quote
The FA* 400 lens on k20d would give focal view of +/- 550/600mm right ? Does this mean also DA* 300 will give +/- 450mm focal view on k20d ?
fa 400mm is 400mm on FF and 600mm on APS-C
da 300 + 1,5tc is 450mm on FF and 675mm on APS-C

(k20d is APS-C)
06-14-2009, 11:09 AM   #11
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400 mm focal length is 400 mm focal length on any camera. The sensor is about 2/3 of the size of 35 mm film, so the picture looks like a 35 mm film shot cropped to show the center 2/3 and then magnified to the size chosen.

I cannot comment much on the FA400 (other than I'd love to try one ), but I do have a DA*300 and a Sigma 150-500 HSM zoom. The Sigma is a big, heavy beast to carry but does work well. Note that this one does have HSM. I do not find that it beats the DA*300 and a Tamron 1.4x TC for IQ, but it is pretty close.

Here are a few bird shots with the DA*300 on the K20D (no TC)

Western Meadowlark


Not sure who


Bald Eagle (the zoom would have been nice - I underestimated wingspan while waiting for takeoff )


Killdeer


And with the Sigma

Marsh Wren (one of our tinier birds) - Sigma at 340mm


California Quail - Sigma at 370mm


Western Kingbirds - Sigma at 400mm

Last edited by kevindt; 06-14-2009 at 11:31 AM.
06-14-2009, 03:41 PM   #12
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QuoteOriginally posted by and Quote
fa 400mm is 400mm on FF and 600mm on APS-C
da 300 + 1,5tc is 450mm on FF and 675mm on APS-C

(k20d is APS-C)
Straight to the point. Thanks
06-14-2009, 03:46 PM   #13
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QuoteOriginally posted by kevindt Quote
400 mm focal length is 400 mm focal length on any camera. The sensor is about 2/3 of the size of 35 mm film, so the picture looks like a 35 mm film shot cropped to show the center 2/3 and then magnified to the size chosen.

I cannot comment much on the FA400 (other than I'd love to try one ), but I do have a DA*300 and a Sigma 150-500 HSM zoom. The Sigma is a big, heavy beast to carry but does work well. Note that this one does have HSM. I do not find that it beats the DA*300 and a Tamron 1.4x TC for IQ, but it is pretty close.

Here are a few bird shots with the DA*300 on the K20D (no TC)

.....
So, for you, between the two DA*300 wins due to weight and better IQ. a light lens is also important to me and silent
06-14-2009, 03:52 PM   #14
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QuoteOriginally posted by and Quote
fa 400mm is 400mm on FF and 600mm on APS-C
da 300 + 1,5tc is 450mm on FF and 675mm on APS-C

(k20d is APS-C)
DA*300 is FF compatible ?
06-14-2009, 03:56 PM   #15
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QuoteOriginally posted by netuser Quote
DA*300 is FF compatible ?
Yes.

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