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10-25-2009, 04:38 PM   #16
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do u think is sharp enough?



10-25-2009, 05:11 PM   #17
Voe
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QuoteOriginally posted by D W Quote
I do believe F* unlike FA* does not pass all information necessary for aperture/exposure control in the latest cameras. (This was from the last millennium and my memory in not the same. Pentaxians please correct me)
The only thing the F lens does not pass is the focal length information to the camera. Meaning you will have to dial the focal length when you turn on the camera for the purpose of shake reduction.

F lenses behave the same as A lenses with the addition of autofocus.
10-26-2009, 08:53 AM   #18
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QuoteOriginally posted by Voe Quote
The only thing the F lens does not pass is the focal length information to the camera. Meaning you will have to dial the focal length when you turn on the camera for the purpose of shake reduction.

F lenses behave the same as A lenses with the addition of autofocus.
Are you sure onn thiis?
None of my cameras have ever askeddd my for FL when I have F50/1.7 on. And I've usedd that lens on K100D, K10D and GX20.

Peter
10-26-2009, 09:00 AM   #19
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QuoteOriginally posted by TroopeR_ITA Quote
what u will choice??

if I take F*300mm price would be lower about 300 eur..

any suggestion?
I'd go for the F*
personaly, I've ended up with FA*300 which is opticaly the same as F*, but lacks collar and has removable hood instead of built in one. I paid 550GBP vs 1049 on cheapest new DA*. Do I miss WR and SDM? NO!, those two are not worth 2x the price IMO. The 1/3 of stop is not that much differencce. And I got 6 months guaranty on any mechannical problems.
In your case, if it's reputable dealer and the lens is in good condition, I'd go with F*.

BR
Peter

10-27-2009, 03:59 PM   #20
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QuoteOriginally posted by Voe Quote
The only thing the F lens does not pass is the focal length information to the camera. Meaning you will have to dial the focal length when you turn on the camera for the purpose of shake reduction.

F lenses behave the same as A lenses with the addition of autofocus.
The two F lenses I own (F28 and F135) doesn't ask for the focla length either. It works just like my FA lenses.
10-28-2009, 04:03 AM   #21
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F lens does not transmit MTF info to the camera, unlike FA lens.
10-28-2009, 06:22 AM   #22
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QuoteOriginally posted by Voe Quote
The only thing the F lens does not pass is the focal length information to the camera. Meaning you will have to dial the focal length when you turn on the camera for the purpose of shake reduction.

F lenses behave the same as A lenses with the addition of autofocus.
Rubbish.
I have never had to input the focal length when attaching my F* 300mm f4.5.
10-28-2009, 07:12 AM   #23
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QuoteOriginally posted by sbc Quote
F lens does not transmit MTF info to the camera, unlike FA lens.
That may be true (I don't know), but what's lost? The only thing, that will not work is the MTF-priority in P-mode. But that is not really necessary with the 300/4.5, as it seems to be a very good lens at all f-stops.

Ben

10-28-2009, 07:35 AM   #24
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QuoteOriginally posted by pcarfan Quote
The two F lenses I own (F28 and F135) doesn't ask for the focla length either. It works just like my FA lenses.
I do not own any F series lenses, but is it not the case that SR needs to have that information input to work. However, since we are talking about long lenses here, a tripod is likely being used and SR turned off anyway, also is MTF info of any value if not using the P mode?
10-28-2009, 09:15 AM   #25
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QuoteOriginally posted by MikePerham Quote
I do not own any F series lenses, but is it not the case that SR needs to have that information input to work. However, since we are talking about long lenses here, a tripod is likely being used and SR turned off anyway
To be honest the F* 300mm is such a compact lens it doesn't really require a tripod.
Infact I would say my 50-135mm is probably longer (or if it isnt then there's not much in it).
10-28-2009, 09:18 AM   #26
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f*300mm on the way!

I hope to do some good photos
10-28-2009, 10:35 AM   #27
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QuoteOriginally posted by Mike.P Quote
To be honest the F* 300mm is such a compact lens it doesn't really require a tripod.
Infact I would say my 50-135mm is probably longer (or if it isnt then there's not much in it).
I don't know how does F* compare to FA*, but the latter is about half inch longer than DA*50-135 and not much thicker either. Very compact for fast 300 IMO.
10-28-2009, 11:12 AM   #28
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QuoteOriginally posted by axl Quote
I don't know how does F* compare to FA*, but the latter is about half inch longer than DA*50-135 and not much thicker either. Very compact for fast 300 IMO.
From what I can see the F* and FA* 300mm are exactly the same length but the F* weighs slightly less.
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