the * series

feverbeaver · 02-14-2015, 07:21 AM

A*1200mm is a prime and *, but "only" has f8. Same for the A*600mm 5.6.
I think * are for fast lenses with use of special glas (ED, ...) and complex optical formula.
The 560mm is optical an easy design.

**Just1MoreDave** · 02-14-2015, 11:08 AM

Pentax always has some exceptions to their lens designations. For example, the DA 35mm f2.4 seems like it should be an L lens based on the mount and lack of quick shift. A couple of lenses in the K series aren't auto-aperture. So they don't stick purely to rules.

I think a catch-all rule for the star lenses is "all the features were available to the designers and they put in everything that they thought this lens needed".

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02-14-2015, 07:21 AM	#31
feverbeaver Senior Member Join Date: Aug 2008 Location: Langen, Germany Photos: Gallery Posts: 106	A1200mm is a prime and , but "only" has f8. Same for the A600mm 5.6. I think are for fast lenses with use of special glas (ED, ...) and complex optical formula. The 560mm is optical an easy design.

02-14-2015, 11:08 AM	#32
Just1MoreDave Site Supporter Join Date: Feb 2007 Location: Aurora, CO Photos: Gallery \| Albums Posts: 6,340	Pentax always has some exceptions to their lens designations. For example, the DA 35mm f2.4 seems like it should be an L lens based on the mount and lack of quick shift. A couple of lenses in the K series aren't auto-aperture. So they don't stick purely to rules. I think a catch-all rule for the star lenses is "all the features were available to the designers and they put in everything that they thought this lens needed".