Aspherical or Not Aspherical 15mm SMC

dl6urk · 08-14-2011, 11:27 AM

Hallo,

I own this beautiful item. But Im not sure about construction. Is there anybody knows if aspherical or not?

Thanks for the help.

Regards from Germany, Ralf

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RioRico · 08-14-2011, 12:27 PM

The review page [ Pentax 15mm F3.5 Reviews ] points to this information page [ Lens Fact Sheet: SMC Pentax-K 15mm ] which doesn't say anything about aspherical elements. I think aspherical elements were very rare when this was made. Maybe someone else here can say for sure.

**interested_observer** · 08-14-2011, 01:21 PM

Afternoon, Take a look at the lens review for this. There is some information there about it may being aspherical....

**Just1MoreDave** · 08-14-2011, 01:58 PM

Here's another link for you:

K 15/3.5 AL

**interested_observer** · 08-14-2011, 02:31 PM

Afternoon Ralf,

Based on the link that Just1MoreDave posted to Bdimitrov K15mm page, your lens with the "4" in the feet distance scale, along with the serial numbers from the page, probably does have an aspherical element.

feverbeaver · 08-14-2011, 03:08 PM

It is an aspherical.

pickles · 08-14-2011, 05:06 PM

Very nice, I have the equivalent M42 version, with its original caps & case.
Cheers, Pickles.

dl6urk · 08-15-2011, 09:38 AM

Ok, my SMC 3,5 15mm asph shows an very impressive over the field performance. Thanks for the helpful links.

Regards Ralf

08-14-2011, 01:21 PM	#3
interested_observer Loyal Site Supporter Join Date: Jun 2009 Location: Tumbleweed, Arizona Photos: Gallery \| Albums Posts: 5,707	Afternoon, Take a look at the lens review for this. There is some information there about it may being aspherical.... Pentax 15mm F3.5 Reviews - K Prime Lenses - Pentax Lens Reviews & Complete Lens Database 15

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08-14-2011, 12:27 PM	#2
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	The review page [ Pentax 15mm F3.5 Reviews ] points to this information page [ Lens Fact Sheet: SMC Pentax-K 15mm ] which doesn't say anything about aspherical elements. I think aspherical elements were very rare when this was made. Maybe someone else here can say for sure.

08-14-2011, 01:58 PM	#4
Just1MoreDave Site Supporter Join Date: Feb 2007 Location: Aurora, CO Photos: Gallery \| Albums Posts: 6,340	Here's another link for you: K 15/3.5 AL

08-14-2011, 02:31 PM	#5
interested_observer Loyal Site Supporter Join Date: Jun 2009 Location: Tumbleweed, Arizona Photos: Gallery \| Albums Posts: 5,707	Afternoon Ralf, Based on the link that Just1MoreDave posted to Bdimitrov K15mm page, your lens with the "4" in the feet distance scale, along with the serial numbers from the page, probably does have an aspherical element.

08-14-2011, 03:08 PM	#6
feverbeaver Senior Member Join Date: Aug 2008 Location: Langen, Germany Photos: Gallery Posts: 106	It is an aspherical.

08-14-2011, 05:06 PM	#7
pickles Veteran Member Join Date: May 2010 Location: melbourne Posts: 937	Very nice, I have the equivalent M42 version, with its original caps & case. Cheers, Pickles.

08-15-2011, 09:38 AM	#8
dl6urk New Member Join Date: Aug 2011 Posts: 2 Original Poster	Ok, my SMC 3,5 15mm asph shows an very impressive over the field performance. Thanks for the helpful links. Regards Ralf