why

alan1 · 08-06-2014, 12:29 PM

why does'nt the likes of sigma and tamrom make more lenses for pentax cameras,saw a test in a recent mag on macro lenses.the pentax one was the dearest but came out poorly in iq,etc,yet tamron and sigma which were cheaper had better iq,but only fitted canon ,nikon etc.

VoiceOfReason · 08-06-2014, 12:32 PM

Pentax market share is why.

Fogel70 · 08-06-2014, 12:47 PM

Which lenses where tested?
All macro lenses on the market today are very good, so it's very small difference in IQ between them.
Tamron and Sigma has macro lenses for Pentax (but not all version they have).

Adam · 08-06-2014, 12:48 PM

Tamron is a different story, but almost every recent Sigma lens is also available for Pentax, so we should be thankful

Adam
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Parallax · 08-06-2014, 12:51 PM

Moved to the proper forum.

Mike.P® · 08-06-2014, 12:58 PM

Originally posted by Adam

Tamron is a different story, but almost every recent Sigma lens is also available for Pentax, so we should be thankful

Unfortunately not the interesting stuff though .... like the 50-150mm OS, 120-300mm OS, 150mm OS Macro or 180mm OS Macro

lytrytyr · 08-06-2014, 01:43 PM

Originally posted by Mike.P®

Unfortunately not the interesting stuff though .... like the 50-150mm OS, 120-300mm OS, 150mm OS Macro or 180mm OS Macro

Pentax bodies include the shake reduction system,
so there's no need to drain the batteries or decenter the optics with OS.

Adam · 08-06-2014, 02:15 PM

Originally posted by Mike.P®

Unfortunately not the interesting stuff though .... like the 50-150mm OS, 120-300mm OS, 150mm OS Macro or 180mm OS Macro

Yup, it would certainly be nice if either of those macro lenses were available.

robjmitchell · 08-06-2014, 02:20 PM

The mag must have gone hunting for a bad copy since the IQ of the pentax 100wr is superb. It has a 9.64 user review rating. The only thing it lacks is an autofocus limiter and and aperture ring.

Mike.P® · 08-06-2014, 02:39 PM

Originally posted by lytrytyr

Pentax bodies include the shake reduction system,
so there's no need to drain the batteries or decenter the optics with OS.

Having OS (or not) makes very little difference if they don't produce the lens in Pentax mount to begin with.

I have to say though that the two Sigma lenses I do have (70-200mm f2.8 OS and 50-500mm OS) are much nicer to use when compared to Pentax SR due to the steadier image through the viewfinder. I would imagine that would be a benefit when shooting macro as well.

VisualDarkness · 08-06-2014, 03:27 PM

Sigma can barely cope with the demand for some of their new lenses, constantly back-ordered, and Tamron is partly owned by Sony who probably have a say in this.

VoiceOfReason · 08-06-2014, 06:55 PM

I'd like the Tamron150-600 myself. I probably couldn't afford the Sigma 120-300 f/2.8 if it were in Pentax mount.

08-06-2014, 12:29 PM	#1
alan1 Junior Member Join Date: Sep 2012 Posts: 35	why why does'nt the likes of sigma and tamrom make more lenses for pentax cameras,saw a test in a recent mag on macro lenses.the pentax one was the dearest but came out poorly in iq,etc,yet tamron and sigma which were cheaper had better iq,but only fitted canon ,nikon etc.

08-06-2014, 02:15 PM	#8
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,594	Originally posted by Mike.P® Unfortunately not the interesting stuff though .... like the 50-150mm OS, 120-300mm OS, 150mm OS Macro or 180mm OS Macro Yup, it would certainly be nice if either of those macro lenses were available. 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:

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08-06-2014, 12:32 PM	#2
VoiceOfReason Site Supporter Join Date: Jun 2010 Location: Mishawaka IN area Photos: Albums Posts: 6,124	Pentax market share is why.

08-06-2014, 12:47 PM	#3
Fogel70 Pentaxian Join Date: Sep 2009 Location: Stockholm, Sweden Photos: Albums Posts: 3,062	Which lenses where tested? All macro lenses on the market today are very good, so it's very small difference in IQ between them. Tamron and Sigma has macro lenses for Pentax (but not all version they have).

08-06-2014, 12:48 PM	#4
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,594	Tamron is a different story, but almost every recent Sigma lens is also available for Pentax, so we should be thankful 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:

08-06-2014, 12:51 PM	#5
Parallax Senior Moderator Loyal Site Supporter Join Date: Apr 2008 Location: South Dakota Photos: Gallery Posts: 19,332	Moved to the proper forum.

08-06-2014, 12:58 PM	#6
Mike.P® Veteran Member Join Date: Mar 2008 Location: New Milton, Hampshire, UK Photos: Gallery \| Albums Posts: 2,154	Originally posted by Adam Tamron is a different story, but almost every recent Sigma lens is also available for Pentax, so we should be thankful Unfortunately not the interesting stuff though .... like the 50-150mm OS, 120-300mm OS, 150mm OS Macro or 180mm OS Macro

08-06-2014, 01:43 PM	#7
lytrytyr Pentaxian Join Date: Nov 2011 Photos: Gallery \| Albums Posts: 4,310	Originally posted by Mike.P® Unfortunately not the interesting stuff though .... like the 50-150mm OS, 120-300mm OS, 150mm OS Macro or 180mm OS Macro Pentax bodies include the shake reduction system, so there's no need to drain the batteries or decenter the optics with OS.

08-06-2014, 02:20 PM	#9
robjmitchell Veteran Member Join Date: Oct 2007 Location: Melbourne Aus Posts: 1,776	The mag must have gone hunting for a bad copy since the IQ of the pentax 100wr is superb. It has a 9.64 user review rating. The only thing it lacks is an autofocus limiter and and aperture ring.

08-06-2014, 02:39 PM	#10
Mike.P® Veteran Member Join Date: Mar 2008 Location: New Milton, Hampshire, UK Photos: Gallery \| Albums Posts: 2,154	Originally posted by lytrytyr Pentax bodies include the shake reduction system, so there's no need to drain the batteries or decenter the optics with OS. Having OS (or not) makes very little difference if they don't produce the lens in Pentax mount to begin with. I have to say though that the two Sigma lenses I do have (70-200mm f2.8 OS and 50-500mm OS) are much nicer to use when compared to Pentax SR due to the steadier image through the viewfinder. I would imagine that would be a benefit when shooting macro as well.

08-06-2014, 03:27 PM	#11
VisualDarkness Veteran Member Join Date: Nov 2011 Location: Uppsala, Sweden Photos: Gallery Posts: 4,439	Sigma can barely cope with the demand for some of their new lenses, constantly back-ordered, and Tamron is partly owned by Sony who probably have a say in this.

08-06-2014, 06:55 PM	#12
VoiceOfReason Site Supporter Join Date: Jun 2010 Location: Mishawaka IN area Photos: Albums Posts: 6,124	I'd like the Tamron150-600 myself. I probably couldn't afford the Sigma 120-300 f/2.8 if it were in Pentax mount.