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07-19-2017, 06:24 AM - 1 Like   #16
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The Tamron is a great place to start. But if you get proficient using it, eventually it won't be sharp enough. I'd say buy it, see how much you like using it, but save up for the 55-300. I had the Sigma 70-300 not the Tamron, and I came to a pretty good understanding of how much I enjoy useing long lenses. But as soon as I started looking at producing pro quality images, I wanted something better. That being said, some of my favourite images were taken with it, I learned a lot using it, and not every image needs to be razor sharp to be effective. You can do a lot with such a lens. And if you are a guy like me, the macro function was a big part of my enjoyment of the lens. I seriously wish there was a pro quality lens with the same functionality. I love the quality of my telephotos and macro lenses, but I have to carry two lenses instead of one.

My advice would be start with a cheap Sigma or Tamron. Then shoot with it until your technique demands more resolving power. It was about 5 years before I became unhappy with my Sigma. The problem with starting with an expensive lens, is, you may never develop the technique and experience to exploit it. 70-300 lenses will get you going at a lot less cost, and let you get your feet wet without gambling on more expensive gear, that you think you might like, but which in the end really doesn't suit your style.


Last edited by normhead; 07-19-2017 at 11:49 AM.
07-19-2017, 05:49 PM - 1 Like   #17
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I can offer two more options, for semi AF any Pentax 300/4 (KM or A) plus the 1.7x AF Adaptors


Or a tamron adaptall SP 200-500/5.6. I got mine in KA mount for 350 An interesting lens especially considering close focus is only 2.5 meters. That's quite close for a 500mm lens
07-19-2017, 08:37 PM - 1 Like   #18
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QuoteOriginally posted by Saarepoiss Quote
but what do you think about Tamron 70-300mm f/4-5.6 or 100-400mm Promaster (youtube) and what do think how FA80-320 compares with these lenses?
The Tamron 70-300 is an interesting lens. I've owned 5 or 6 copies over the years, and well as 2 copies of the Pentax DA 55-300. I found them to be equal in terms of sharpness. I found the Pentax to have better color and contrast, and very little purple fringing (whereas the Tamron has much purple fringing, although that can be minimized in software). What I like most about the Tamron is the 1:2 "Macro" mode, which I use to photograph butterflies and other large insects. So while I've sold the Pentax 55-300's, I keep a Tamron 70-300 around.

07-19-2017, 08:56 PM   #19
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QuoteOriginally posted by Lowell Goudge Quote
I can offer two more options, for semi AF any Pentax 300/4 (KM or A) plus the 1.7x AF Adaptors


Or a tamron adaptall SP 200-500/5.6. I got mine in KA mount for 350 An interesting lens especially considering close focus is only 2.5 meters. That's quite close for a 500mm lens
That Adaptall is a nice lens. Mine I have essentially permamounted with the 1.4x TC and use it primarily on a tripod for backyard birding and the like. I don't know if I'd recommended to a newbie like the OP, though, as the MF can be a bit tetchy.

700mm, no crop...



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