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hinman · 08-03-2008, 07:51 AM

A catchy title and here are some test shots.

The Unknown Pentax FA 70mm f/2.0

Tamron 1.4x Pz-AF TC | Pentax FA 50 f/1.4

#1

#2

#3

#4

#5

#6

#7

The Unknown Pentax FA 70mm f/2.0

Results are not too impressive but not bad either
AF with Tamron 1.4x TC is dead on with the Pentax FA 50 f/1.4, fast and easy
Some test shots done in f/2.8 are pretty reasonable in sharpness. This is subjective and need more test to confirm
In a pinch without a good 70mm zoom such as my Tamron 28-75 f/2.8, I would use this mysterious Pentax FA 70 f/2.0
Weight and size is not too bad at all, very comfortable as a 70mm prime
Indoor portraits are not impressive in terms of sharpness and color, more test needed to confirm
Results are not yet conclusive as I have only used it for few test shots
Flash shot with internal flash are faulted with unusable results. Seems like the presence of TC has made the internal flash unusable

Thanks,
Hin

beaumont · 08-03-2008, 08:31 AM

I'm not familiar with teleconverters (I'm a newbie). What kind of results could one expect when using with a 31ltd?

hinman · 08-03-2008, 09:39 AM

Originally posted by beaumont

I'm not familiar with teleconverters (I'm a newbie). What kind of results could one expect when using with a 31ltd?

TC are used in tele lens with all the caveats of f/stop loss, loss of IQ, color and contrast. I don't think I would recommend using it on the 31 limited. People would flame me if I made any other suggestion otherwise.

The 50mm is the widest focal length that I would try testing the TC on.

Thanks,
Hin

k100d · 08-04-2008, 07:34 AM

thanks for showing the tests. would you actually use this combination for more serious photos?
on a side note: i remember a long time ago there was an identify the bokeh test where someone paired a lens with a TC to give some interesting results.

hinman · 08-04-2008, 10:11 AM

Originally posted by k100d

thanks for showing the tests. would you actually use this combination for more serious photos?
on a side note: i remember a long time ago there was an identify the bokeh test where someone paired a lens with a TC to give some interesting results.

It really depends on what I have in the bag. If I have my Tamron 28-70 f/2.8 in the bag, I would prefer the better gear for sure. But let say, I have my Tamron 70-300 Di LD with the Tamron 1.4x TC, along with my FA 50 f/1.4 for fast speed. I would try the combination for a good 70mm f/2.0 as a reasonable alternative to Tamron 70-300 zoom. How well it does against Tamron 70-300 in the 70mm in f/4.0, I don't have the comparison yet. But I think the 50mm + Tamron 1.4x may do better in terms of CA.

With the Tamron 1.4x, my fast 50mm works out quite well in the AF and the combination gives me a workout to see if I like the 70mm lens as a prime.

Thanks,
Hin

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08-03-2008, 07:51 AM	#1
hinman Veteran Member Join Date: Oct 2006 Location: Fremont, CA Photos: Albums Posts: 3,473	The Unknown Pentax FA 70mm f/2.0 A catchy title and here are some test shots. The Unknown Pentax FA 70mm f/2.0 Tamron 1.4x Pz-AF TC \| Pentax FA 50 f/1.4 #1 #2 #3 #4 #5 #6 #7 The Unknown Pentax FA 70mm f/2.0 Results are not too impressive but not bad either AF with Tamron 1.4x TC is dead on with the Pentax FA 50 f/1.4, fast and easy Some test shots done in f/2.8 are pretty reasonable in sharpness. This is subjective and need more test to confirm In a pinch without a good 70mm zoom such as my Tamron 28-75 f/2.8, I would use this mysterious Pentax FA 70 f/2.0 Weight and size is not too bad at all, very comfortable as a 70mm prime Indoor portraits are not impressive in terms of sharpness and color, more test needed to confirm Results are not yet conclusive as I have only used it for few test shots Flash shot with internal flash are faulted with unusable results. Seems like the presence of TC has made the internal flash unusable Thanks, Hin

08-03-2008, 08:31 AM	#2
beaumont Veteran Member Join Date: Mar 2008 Posts: 505	I'm not familiar with teleconverters (I'm a newbie). What kind of results could one expect when using with a 31ltd?

08-03-2008, 09:39 AM	#3
hinman Veteran Member Join Date: Oct 2006 Location: Fremont, CA Photos: Albums Posts: 3,473 Original Poster	Originally posted by beaumont I'm not familiar with teleconverters (I'm a newbie). What kind of results could one expect when using with a 31ltd? TC are used in tele lens with all the caveats of f/stop loss, loss of IQ, color and contrast. I don't think I would recommend using it on the 31 limited. People would flame me if I made any other suggestion otherwise. The 50mm is the widest focal length that I would try testing the TC on. Thanks, Hin Last edited by hinman; 08-03-2008 at 10:01 AM.

08-04-2008, 07:34 AM	#4
k100d Veteran Member Join Date: Feb 2008 Location: Toronto Posts: 3,911	thanks for showing the tests. would you actually use this combination for more serious photos? on a side note: i remember a long time ago there was an identify the bokeh test where someone paired a lens with a TC to give some interesting results.

08-04-2008, 10:11 AM	#5
hinman Veteran Member Join Date: Oct 2006 Location: Fremont, CA Photos: Albums Posts: 3,473 Original Poster	Originally posted by k100d thanks for showing the tests. would you actually use this combination for more serious photos? on a side note: i remember a long time ago there was an identify the bokeh test where someone paired a lens with a TC to give some interesting results. It really depends on what I have in the bag. If I have my Tamron 28-70 f/2.8 in the bag, I would prefer the better gear for sure. But let say, I have my Tamron 70-300 Di LD with the Tamron 1.4x TC, along with my FA 50 f/1.4 for fast speed. I would try the combination for a good 70mm f/2.0 as a reasonable alternative to Tamron 70-300 zoom. How well it does against Tamron 70-300 in the 70mm in f/4.0, I don't have the comparison yet. But I think the 50mm + Tamron 1.4x may do better in terms of CA. With the Tamron 1.4x, my fast 50mm works out quite well in the AF and the combination gives me a workout to see if I like the 70mm lens as a prime. Thanks, Hin