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airjames · 07-31-2018, 10:13 PM - **1 Like**

Originally posted by Gianclaudio

How are the 31 and 43 FA limited on CA's compared to more modern glass like the Sigma and DA*55?

Thanks in advance

They are all pretty good even wide open. They all have pretty similar CA with the higher f stops being best. I always use Lightroom so I haven't really noticed which has been worse but I do know that the FA lenses will have a tad more IF at the same F stops as the Sigma and DA55

wed7 · 08-01-2018, 02:08 AM - **1 Like**

You are so lucky, Pentax has the FA 43 and is very good for portraits. I am talking about FF perspective.

MiLKMAN · 08-01-2018, 01:42 PM - **1 Like**

Both are good. It all comes down to what focal length You use the most. Both have good contrast and are sharp wide open. On negatives Pentax have slow focusing speed, Sigma is big and heavy.

gm4life · 08-01-2018, 09:45 PM - **1 Like**

To the OP, the DA * 55 is a honey of a lens. I loved mine and handed it off to the big guy ie. my dad when my new DFA * 50 arrived.

The 55 is sharp has the nice glow in F1.4 scenarios as Sandy mentioned and takes simply awesome portraits. Landscapes and low light scenarios were never a problem either.

My vote is for the 55.

Gianclaudio · 08-02-2018, 10:57 AM - **1 Like**

Thanks folks, I'll get the DA*55 and call it a day.
I'm not willing to deal with focus inaccuracy of the Sigma, plus the Pentax is cheaper, smaller and WR.

SSGGeezer · 08-02-2018, 11:04 AM - **1 Like**

Originally posted by Gianclaudio

Thanks folks, I'll get the DA*55 and call it a day.
I'm not willing to deal with focus inaccuracy of the Sigma, plus the Pentax is cheaper, smaller and WR.

Sounds like the right call! I had my eye on the new ones for sale at Mcbains in Canada for about 410 USD shipped! I have a few 50mm lenses so really don't need one but at that kind of a deal, it was hard to resist. But I did! LBA conquered for at least a few hours that is!

Gianclaudio · 08-02-2018, 11:30 AM - **1 Like**

Originally posted by SSGGeezer

Sounds like the right call! I had my eye on the new ones for sale at Mcbains in Canada for about 410 USD shipped! I have a few 50mm lenses so really don't need one but at that kind of a deal, it was hard to resist. But I did! LBA conquered for at least a few hours that is!

Haha, I know that feeling. Pentax has some real nice offers these day, and you get lots of quality for the money.

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07-31-2018, 10:13 PM - 1 Like	#16
airjames Senior Member Join Date: Nov 2012 Photos: Gallery Posts: 295	Originally posted by Gianclaudio How are the 31 and 43 FA limited on CA's compared to more modern glass like the Sigma and DA*55? Thanks in advance They are all pretty good even wide open. They all have pretty similar CA with the higher f stops being best. I always use Lightroom so I haven't really noticed which has been worse but I do know that the FA lenses will have a tad more IF at the same F stops as the Sigma and DA55

08-01-2018, 02:08 AM - 1 Like	#17
wed7 Pentaxian Join Date: Mar 2010 Location: Manila, Philippines Posts: 1,421	You are so lucky, Pentax has the FA 43 and is very good for portraits. I am talking about FF perspective.

08-01-2018, 01:42 PM - 1 Like	#18
MiLKMAN Senior Member Join Date: Sep 2008 Location: Tallinn Photos: Gallery Posts: 146	Both are good. It all comes down to what focal length You use the most. Both have good contrast and are sharp wide open. On negatives Pentax have slow focusing speed, Sigma is big and heavy.

08-01-2018, 09:45 PM - 1 Like	#19
gm4life Veteran Member Join Date: Dec 2016 Posts: 602	To the OP, the DA * 55 is a honey of a lens. I loved mine and handed it off to the big guy ie. my dad when my new DFA * 50 arrived. The 55 is sharp has the nice glow in F1.4 scenarios as Sandy mentioned and takes simply awesome portraits. Landscapes and low light scenarios were never a problem either. My vote is for the 55.

08-02-2018, 10:57 AM - 1 Like	#20
Gianclaudio Senior Member Join Date: Oct 2017 Location: Hannover Photos: Gallery Posts: 163 Original Poster	Thanks folks, I'll get the DA*55 and call it a day. I'm not willing to deal with focus inaccuracy of the Sigma, plus the Pentax is cheaper, smaller and WR.

08-02-2018, 11:04 AM - 1 Like	#21
SSGGeezer Veteran Member Join Date: Jun 2017 Location: Indiana, U.S. Photos: Gallery \| Albums Posts: 4,845	Originally posted by Gianclaudio Thanks folks, I'll get the DA*55 and call it a day. I'm not willing to deal with focus inaccuracy of the Sigma, plus the Pentax is cheaper, smaller and WR. Sounds like the right call! I had my eye on the new ones for sale at Mcbains in Canada for about 410 USD shipped! I have a few 50mm lenses so really don't need one but at that kind of a deal, it was hard to resist. But I did! LBA conquered for at least a few hours that is!

08-02-2018, 11:30 AM - 1 Like	#22
Gianclaudio Senior Member Join Date: Oct 2017 Location: Hannover Photos: Gallery Posts: 163 Original Poster	Originally posted by SSGGeezer Sounds like the right call! I had my eye on the new ones for sale at Mcbains in Canada for about 410 USD shipped! I have a few 50mm lenses so really don't need one but at that kind of a deal, it was hard to resist. But I did! LBA conquered for at least a few hours that is! Haha, I know that feeling. Pentax has some real nice offers these day, and you get lots of quality for the money.

Sigma Art 35mm 1.4 or Pentax DA* 55mm 1.4

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