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01-15-2013, 11:38 AM   #1
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New and need help choosing a zoom lens

I'm a portrait and wedding photographer who is switching from Canon to Pentax. I have a K5-ii. I need a zoom lens somewhere near the range of a 28-200 F2.8. I know I can't get a Pentax brand lens like this and I can't afford more than $1000 max. so what options are there for what I need?

01-15-2013, 11:40 AM   #2
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I'd recommend the Tamron 70-200mm:
Tamron 70-200mm F2.8 Di LD Macro Lens Reviews - Tamron Lenses - Pentax Lens Review Database

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01-15-2013, 11:48 AM   #3
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I think you have a typo there. A 28-200 constant 2.8 (or even 2.8-x) lens is possibly impossible or at least highly impractical. You can get a 16-50 and 50-135 constant 2.8's to get a 24-75-200 two_lens kit.
01-15-2013, 11:53 AM   #4
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QuoteOriginally posted by Giklab Quote
I think you have a typo there. A 28-200 constant 2.8 (or even 2.8-x) lens is possibly impossible or at least highly impractical. You can get a 16-50 and 50-135 constant 2.8's to get a 24-75-200 two_lens kit.
Canon EF 70-200mm f/2.8L IS USM Telephoto Zoom Lens for Canon SLR Cameras
by Canon
4.8 out of 5 stars See all reviews (248 customer reviews) | Like (43)
Price: $2,099.00

Well that's what I have and here is one for sale. Why is it impractical? and why do you say constant? It goes down to F2.8 but you can adjust the aperture for correct exposure just as you would on any other lens.

01-15-2013, 12:19 PM   #5
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constant f/2.8 means that the wide open value of f/2.8 is constant throughout the zoom range.
Cheaper zoom lens have vairable values.

As for 28-200 and 70-200, the differnce between 28 and 70 is very large... there is no such lens with f/2.8 that covers such a range.
Canon and others cover that range with 2 lenses.

Pentax offers 16-50 and 50-135 that has the same AOV as 24-70 and 70-200 on FF camera.
01-15-2013, 12:54 PM   #6
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QuoteOriginally posted by drrae Quote
why is it impractical?
$2,099.00
01-15-2013, 01:37 PM   #7
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Did you shoot on crop or full frame cameras? If crop then get a 70-200 2.8 from Tamron or sigma. If FF then get the DA* 50-135.
Also, lol @wildman

01-15-2013, 01:38 PM   #8
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check the marketplace right now, there is a Sigma 70-200 f2.8 for sale as well as a Sigma 17-50 f2.8. That would make a great wedding 2 lens kit
01-15-2013, 02:21 PM   #9
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QuoteOriginally posted by wildman Quote
$2,099.00
I think you missed the OP - he said 28 as in TWENTYEIGHT to 200 F2.8. The 70-200mm F2.8 lenses are already big - can't imagine what a 28-200mm F2.8 would look like (or cost), and currently does not exist - even in the Canon lineup!
01-15-2013, 02:24 PM   #10
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The Tamron Di 70-200mm F2.8 would take care of the upper range at a much lower price than the Canon - about $600 used - heck - I'll sell you mine ;-) The 50-135mm would be smaller and might work better, though you may pay a little more than $600 for a used one. Add one of the 17-50mm F2.8 lenses by Sigma or Tamron, and you are covered
01-15-2013, 04:20 PM   #11
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So, were you using a FF canon? If so, I think you'd be happy with a used DA*50-135. This Tokina-made lens is one of the better zooms available from anyone.
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