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Cameras, Lenses and Accessories: Discuss Telephoto lens for K200D...Hi all Newbie here I own a Pentax DSLR K200D and I am looking a couple of lenses and need ...
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Old 09-06-2010, 15:36   #1 (permalink)
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Telephoto lens for K200D

Hi all Newbie here
I own a Pentax DSLR K200D and I am looking a couple of lenses and need an opinion the first one is a Sigma 28-300mm F3.5-6.3 DG Macro the other is a Tamron AF28-300mm F/3.5-6.3 XR Di LD Aspherical (IF) Macro.
Is there an opinion of which is better and why?
It was also suggested that I go for the Tamron 18-250mm f/3.5-f/6.3 XR DI-II LD Aspherical (IF) AF
I basically want a lens thats pretty much all rounder.
Also what does this mean APS-C size digital SLR cameras, it was used in refernce to the 28-300mm lens
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Old 09-06-2010, 15:50   #2 (permalink)
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Re: Telephoto lens for K200D

To answer you last question first, any dSLR that is not a full frame camera has a smaller or APS-C size sensor. The full frame ones are the same size as a 35mm frame. Some lenses are 'optimized' for the smaller sensor, which means that they will not work on the FF cameras. Therefore if you have any designs on going full frame in the future, it might be worth considering buying lenses that will work on a FF sensor from the start as they will quite happily work with the APS-C sensors too.

I think that the 28-300 range is now redundant as the 28 end is not really wide enough for normal use. For a good general purpose lens (often called a walkabout lens) the Tamron 18-270 is pretty good. Sigma do an 18-250 equivalent. These lenses will do 90% of what you want. Both makes have 18-200 in their catalogues too at a lower price.

If you really want to go to 300mm the Sigma 70-300 APO is good value, but it will not cover the wider end of the range where, I'll bet, you will be taking the majority of your shots.

What ever lens you choose remember that at the lower end you don't really want to go higher than 18mm.
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Old 09-06-2010, 16:06   #3 (permalink)
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Re: Telephoto lens for K200D

Hi thanks for that. Tamron don't make a 18-270mm with a Pentax mount only available for Canon & Nikon.
So therefore I would be better off going for an 18-250mm.
Pentax used to have an 18-250mm but it has been taken off the market.
If you were buying the 18-250mm lens. Which would do you prefer the Tamron or Sigma.
Also I am still confused here is my Pentax K200D a full frame
Thanking you in advance jon
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Old 09-06-2010, 16:32   #4 (permalink)
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Re: Telephoto lens for K200D

Your Pentax has an APS-C sensor - often called a crop factor camera/sensor.

I don't think there is much between the Sigma or Tamron - maybe the one you can get the best deal on?
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Old 09-06-2010, 16:42   #5 (permalink)
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Re: Telephoto lens for K200D

Hi
Thanks heaps very much appreciated
Jon
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