Win a Pentax Limited Lens: Raffle Now Live!

baarisa · 02-19-2015, 05:27 AM

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http://www.ebay.co.uk/itm/271791267991?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

http://www.ebay.co.uk/itm/271791285560?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

Last edited by baarisa; 03-02-2015 at 10:31 AM.

goubejp · 02-19-2015, 05:29 AM

These are not premium glasses... The FA* 300 f4.5 and FA* 400 f5.6 are much better lenses...

Driline · 02-19-2015, 06:04 AM

The A star 300 comes with free dust and fungus, so I'm thinking maybe that is rare and should command a premium price

goubejp · 02-20-2015, 01:32 AM

Originally posted by dcshooter

[/COLOR]The 300mm A f/4 is a premium lens and is faster and just as sharp as the FA 300mm 4.5, albeit with slightly more purple fringing on digital. The relatively minor price difference comes down mainly to the presence of AF in the FA.

Certainly not; The A*300 is an optical design without ED glasses, meaning poor correction of chromatic aberrations; the FA* 300 f4.5 is an IF-ED lens, it incorporates 3 ED elements (in blue here)
http://kmp.bdimitrov.de/lenses/primes/_optics/300f4.5.gif
for superior corrections. This is the presence of these ED elements more than the presence of AF that justify the price.
plus internal focusing and of course autofocus

Driline · 02-20-2015, 06:32 AM

I have the F*300 lens which has been compared to the FA*300, but I've never seen anyone equate the build design and image IQ of the A*300 with either of those two lenses.

Driline · 02-20-2015, 07:49 AM

Clearly the F*300 is better than the FA*300. Why? Because it looks cooler with the white finish. Like the A*300 2.8

02-19-2015, 05:27 AM	#1
baarisa New Member Join Date: Feb 2015 Posts: 14	Maybe somebody interested? Staff note: This post may contain affiliate links, which means Pentax Forums may earn a small commission if a visitor clicks through and makes a purchase. If you would like to support the forum directly, you may also make a donation here. http://www.ebay.co.uk/itm/271791267991?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 http://www.ebay.co.uk/itm/271791285560?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 Last edited by baarisa; 03-02-2015 at 10:31 AM.

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02-19-2015, 05:29 AM	#2
goubejp Veteran Member Join Date: Oct 2007 Location: France Photos: Albums Posts: 804	These are not premium glasses... The FA* 300 f4.5 and FA* 400 f5.6 are much better lenses...

02-19-2015, 06:04 AM	#3
Driline Pentaxian Join Date: Dec 2012 Location: IOWA Where the Tall Corn Grows Photos: Gallery Posts: 3,705	The A star 300 comes with free dust and fungus, so I'm thinking maybe that is rare and should command a premium price

02-20-2015, 01:32 AM	#4
goubejp Veteran Member Join Date: Oct 2007 Location: France Photos: Albums Posts: 804	Originally posted by dcshooter [/COLOR]The 300mm A f/4 is a premium lens and is faster and just as sharp as the FA 300mm 4.5, albeit with slightly more purple fringing on digital. The relatively minor price difference comes down mainly to the presence of AF in the FA. Certainly not; The A300 is an optical design without ED glasses, meaning poor correction of chromatic aberrations; the FA 300 f4.5 is an IF-ED lens, it incorporates 3 ED elements (in blue here) http://kmp.bdimitrov.de/lenses/primes/_optics/300f4.5.gif for superior corrections. This is the presence of these ED elements more than the presence of AF that justify the price. plus internal focusing and of course autofocus

02-20-2015, 06:32 AM	#5
Driline Pentaxian Join Date: Dec 2012 Location: IOWA Where the Tall Corn Grows Photos: Gallery Posts: 3,705	I have the F300 lens which has been compared to the FA300, but I've never seen anyone equate the build design and image IQ of the A*300 with either of those two lenses.

02-20-2015, 07:49 AM	#6
Driline Pentaxian Join Date: Dec 2012 Location: IOWA Where the Tall Corn Grows Photos: Gallery Posts: 3,705	Clearly the F300 is better than the FA300. Why? Because it looks cooler with the white finish. Like the A*300 2.8

Maybe somebody interested?

Win a Pentax Limited Lens: Raffle Now Live!