What PKA third-party lenses?

edri · 02-15-2015, 12:45 PM

What third-party type A old lenses, is it wise to be purchased? Lenses with decent quality at a decent price?

**jatrax** · 02-15-2015, 12:50 PM

That is an incredibly broad question. I'm sure others will post with their favorites but you might do better to do some research here: Pentax Lenses by Sigma, Tamron, Zeiss, and more - Reviews and Specification Database - Pentax Lens Review Database to see the reviews and what is availabel.

**boriscleto** · 02-15-2015, 12:50 PM

It's hard to go wrong with a Macro lens.

Adam · 02-15-2015, 01:19 PM

Originally posted by edri

What third-party type A old lenses, is it wise to be purchased? Lenses with decent quality at a decent price?

Samyang lenses and their rebrands are very good: i.e. the 85mm F1.4, 24.mm F1.4, 10mm F2.8, etc.

Adam
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**marcusBMG** · 02-15-2015, 01:23 PM

example:
DA18-135mm: rrp £400+ (329.95 from a shop)
Tamron adaptall SP 28-135mm. Equal/superior in resolution 50-135mm stopped down, markedly inferior at 28mm, not as good wide wide open but faster, more prone to fringing. This assessment from side by side usage and pics comparison. est £30-50 + PKA adapter £40-50.

edri · 02-16-2015, 02:05 AM

Thanks all for the replies. I am interested in MF A type lenses.
I was thinking someone had a pleasant experience with a specific MF A type third party lens that would be worth to buying. What is this lens?

The only MF type A lens that I have is the Samyang fish-eye 8mm. It is ok opticaly, but the focusing distances marked on the lens body do not correspond to actual focus distances.

Joojoo2010 · 02-16-2015, 02:14 AM

Sigma&Vivitar 24mm f2.8 are both very good and cheap

edri · 02-16-2015, 03:01 AM

I read somewhere that some old Sigma lenses can stiffen in the camera mount. Is it possible for A type versions, or is it possible only for pre A Sigma lenses?

Joojoo2010 · 02-16-2015, 03:14 AM

Its possible with all lenses if bad luck probably but more likely with these old thirty party manufacturer lenses than pentax branded lenses. these pk-ar type lens mounts can be little/more tight than others. i try to fit these first to my old (and not working) film body and if lens mount is ok then use with dsrl.

02-15-2015, 12:45 PM	#1
edri Veteran Member Join Date: Jan 2009 Location: walking in the air Posts: 1,315	What PKA third-party lenses? What third-party type A old lenses, is it wise to be purchased? Lenses with decent quality at a decent price?

02-15-2015, 01:23 PM	#5
marcusBMG Site Supporter Join Date: Nov 2012 Location: North Wales Photos: Gallery \| Albums Posts: 2,868	example: DA18-135mm: rrp £400+ (329.95 from a shop) Tamron adaptall SP 28-135mm. Equal/superior in resolution 50-135mm stopped down, markedly inferior at 28mm, not as good wide wide open but faster, more prone to fringing. This assessment from side by side usage and pics comparison. est £30-50 + PKA adapter £40-50. Last edited by marcusBMG; 02-15-2015 at 02:28 PM.

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02-15-2015, 12:50 PM	#2
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	That is an incredibly broad question. I'm sure others will post with their favorites but you might do better to do some research here: Pentax Lenses by Sigma, Tamron, Zeiss, and more - Reviews and Specification Database - Pentax Lens Review Database to see the reviews and what is availabel.

02-15-2015, 12:50 PM	#3
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	It's hard to go wrong with a Macro lens.

02-15-2015, 01:19 PM	#4
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Originally posted by edri What third-party type A old lenses, is it wise to be purchased? Lenses with decent quality at a decent price? Samyang lenses and their rebrands are very good: i.e. the 85mm F1.4, 24.mm F1.4, 10mm F2.8, etc. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

02-16-2015, 02:05 AM	#6
edri Veteran Member Join Date: Jan 2009 Location: walking in the air Posts: 1,315 Original Poster	Thanks all for the replies. I am interested in MF A type lenses. I was thinking someone had a pleasant experience with a specific MF A type third party lens that would be worth to buying. What is this lens? The only MF type A lens that I have is the Samyang fish-eye 8mm. It is ok opticaly, but the focusing distances marked on the lens body do not correspond to actual focus distances.

02-16-2015, 02:14 AM	#7
Joojoo2010 Veteran Member Join Date: Sep 2013 Posts: 306	Sigma&Vivitar 24mm f2.8 are both very good and cheap

02-16-2015, 03:01 AM	#8
edri Veteran Member Join Date: Jan 2009 Location: walking in the air Posts: 1,315 Original Poster	I read somewhere that some old Sigma lenses can stiffen in the camera mount. Is it possible for A type versions, or is it possible only for pre A Sigma lenses?

02-16-2015, 03:14 AM	#9
Joojoo2010 Veteran Member Join Date: Sep 2013 Posts: 306	Its possible with all lenses if bad luck probably but more likely with these old thirty party manufacturer lenses than pentax branded lenses. these pk-ar type lens mounts can be little/more tight than others. i try to fit these first to my old (and not working) film body and if lens mount is ok then use with dsrl.