50mm 1:1.4 at infinity

kplik · 07-18-2007, 11:57 AM

I have come across an SMC-Pentax 50mm 1.4 (screwmount) and would like to use it on my DL with an adapter. Will the adapter interfere with using this lens to focus at infinity?

gussegutt · 07-18-2007, 01:19 PM

A genuine M42 to K mount Pentax adapter or an aftermarket Pentax K mount to M42 without a flange works fine. For an aftermarket adaptor see this link

General Brand Pentax-K Body to Universal Lens Adapter

**jamesk8752** · 07-18-2007, 07:48 PM

If this is a Pentax-made screwmount lens it will be labeled Super-Takumar or SMC-Takumar, not Pentax. All Pentax-labeled lenses are K-mount bayonet, not M42 screw mount.

07-18-2007, 11:57 AM	#1
kplik New Member Join Date: Jun 2007 Location: Toronto Photos: Gallery Posts: 13	50mm 1:1.4 at infinity I have come across an SMC-Pentax 50mm 1.4 (screwmount) and would like to use it on my DL with an adapter. Will the adapter interfere with using this lens to focus at infinity?

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07-18-2007, 01:19 PM	#2
gussegutt Junior Member Join Date: Mar 2007 Location: Underhill, VT USA Posts: 41	A genuine M42 to K mount Pentax adapter or an aftermarket Pentax K mount to M42 without a flange works fine. For an aftermarket adaptor see this link General Brand Pentax-K Body to Universal Lens Adapter

07-18-2007, 07:48 PM	#3
jamesk8752 Site Supporter Join Date: Dec 2006 Location: Suburban Detroit, MI, USA Posts: 238	If this is a Pentax-made screwmount lens it will be labeled Super-Takumar or SMC-Takumar, not Pentax. All Pentax-labeled lenses are K-mount bayonet, not M42 screw mount.