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TroopeR_ITA · 10-25-2009, 04:38 PM

do u think is sharp enough?

Voe · 10-25-2009, 05:11 PM

Originally posted by D W

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.

axl · 10-26-2009, 08:53 AM

Originally posted by Voe

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

axl · 10-26-2009, 09:00 AM

Originally posted by TroopeR_ITA

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

pcarfan · 10-27-2009, 03:59 PM

Originally posted by Voe

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.

sbc · 10-28-2009, 04:03 AM

F lens does not transmit MTF info to the camera, unlike FA lens.

Mike.P® · 10-28-2009, 06:22 AM

Originally posted by Voe

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.

Ben_Edict · 10-28-2009, 07:12 AM

Originally posted by sbc

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

MikePerham · 10-28-2009, 07:35 AM

Originally posted by pcarfan

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?

Mike.P® · 10-28-2009, 09:15 AM

Originally posted by MikePerham

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).

TroopeR_ITA · 10-28-2009, 09:18 AM

f*300mm on the way!

I hope to do some good photos

axl · 10-28-2009, 10:35 AM

Originally posted by Mike.P®

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.

Mike.P® · 10-28-2009, 11:12 AM

Originally posted by axl

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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10-25-2009, 04:38 PM	#16
TroopeR_ITA Forum Member Join Date: Sep 2009 Posts: 79 Original Poster	do u think is sharp enough?

10-25-2009, 05:11 PM	#17
Voe Veteran Member Join Date: Dec 2006 Location: Sydney Photos: Gallery Posts: 719	Originally posted by D W 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
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Originally posted by Voe 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
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Originally posted by TroopeR_ITA what u will choice?? if I take F300mm price would be lower about 300 eur.. any suggestion? I'd go for the F personaly, I've ended up with FA300 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
pcarfan Veteran Member Join Date: Sep 2007 Location: Dayton, Ohio Photos: Gallery \| Albums Posts: 2,978	Originally posted by Voe 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
sbc Pentaxian Join Date: Mar 2008 Photos: Albums Posts: 359	F lens does not transmit MTF info to the camera, unlike FA lens.

10-28-2009, 06:22 AM	#22
Mike.P® Veteran Member Join Date: Mar 2008 Location: New Milton, Hampshire, UK Photos: Gallery \| Albums Posts: 2,154	Originally posted by Voe 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
Ben_Edict Veteran Member Join Date: Jul 2007 Location: SouthWest "Regio" Photos: Albums Posts: 3,309	Originally posted by sbc 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
MikePerham Veteran Member Join Date: May 2007 Location: Prince George, BC Canada Photos: Gallery \| Albums Posts: 642	Originally posted by pcarfan 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
Mike.P® Veteran Member Join Date: Mar 2008 Location: New Milton, Hampshire, UK Photos: Gallery \| Albums Posts: 2,154	Originally posted by MikePerham 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
TroopeR_ITA Forum Member Join Date: Sep 2009 Posts: 79 Original Poster	f*300mm on the way! I hope to do some good photos

10-28-2009, 10:35 AM	#27
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Originally posted by Mike.P® 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 DA50-135 and not much thicker either. Very compact for fast 300 IMO.

10-28-2009, 11:12 AM	#28
Mike.P® Veteran Member Join Date: Mar 2008 Location: New Milton, Hampshire, UK Photos: Gallery \| Albums Posts: 2,154	Originally posted by axl I don't know how does F* compare to FA, but the latter is about half inch longer than DA50-135 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.

DA*300MM f/4 vs F*300mm f/4.5

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DA300MM f/4 vs F300mm f/4.5