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12-08-2007, 12:07 PM   #1
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How are these lenses?

Sigma 70-300mm f/4-5.6 DL Macro for Pentax - (eBay item 110201232786 end time Dec-08-07 19:15:00 PST)
Sigma Aspherical 28-70mm Zoom In Pentax K Mount - (eBay item 140186214099 end time Dec-09-07 16:05:56 PST)

How are these lenses?

12-08-2007, 12:15 PM   #2
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The 300mm is decent but not stellar. The 70mm is very average at best and not worth more than 50.00 but spend your money on better glass in both cases. When it comes to glass there's no free lunch. You do get what you pay for.

Maybe consider the Tamron or Sigma version like this lens:
AF70-300mm F/4-5.6 Di LD 1:2 Macro; Tamron USA, Inc.

Sigma - Lenses

And if I was to make a strong recommendation for a wider to mid tele lens it would have to be the SP AF28-75mm F/2.8 XR Di LD Aspherical (IF); Tamron USA, Inc.

Yes they are a lot more money but absolutely worth it in the long run,
12-08-2007, 01:37 PM   #3
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By the way, I have the Pentax DA 18-55 mm lens that comes with the K10D lens kit. Can I use any filters with it? I want to get a UV and polarizer filters.
12-08-2007, 01:42 PM   #4
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As Peter Zack recommended, get the Tamron equivelant to each of those lenses, as I have, and you will be greatly satisfied. I just got my set in this week. I picked them up for $500 shipped, well worth it.

12-08-2007, 01:48 PM   #5
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QuoteOriginally posted by tux08902 Quote
By the way, I have the Pentax DA 18-55 mm lens that comes with the K10D lens kit. Can I use any filters with it? I want to get a UV and polarizer filters.
The UV filter won't do much for you besides provide protection for the lens. Considering how cheap the kit lens is it doesn't make much sense to protect it with a UV filter. A circular polarizer is a good choice if you plan on shooting out doors a lot. Usually you want to pair a polarizer with a lens that doesn't have a rotating front element.

As for the Ebay lenses, I wouldn't get either one. Usually, people get the APO version of the Sigma 70-300 and I have the Tamron 70-300 already mentioned. I think I'm going to replace it though with the 18-250. If you like landscape photography you probably don't want anything that starts in the 24-28mm range unless you're planning on investing in an ultra-wide lens but that seems be be pretty far above your target price range.
12-08-2007, 01:53 PM   #6
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Alright, I'll wait to buy a new lens then and get something that's really good. As for the polarizing filter, would this work?
12-08-2007, 02:23 PM   #7
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NVM, I need a 52mm.
12-08-2007, 02:25 PM   #8
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Cokin filters are a good brand but frankly I'm not sure what I'm looking at here. Cokin makes a filter holder system as well that the filters drop into and this might be one of those although it looks different than the one I have.

I'd recommend a couple of things. Get a Hoya or Tiffen brand CPL polarizer and get it in 77mm size. Why? because that should be large enough for all your lenses. Then get a stepping ring kit so that you can adapt the polarizer for any lens you may buy now or in the future. I found one of these sets on Ebay for around $20.00 Most decent CPL's will cost $40 and up so this can save you a bundle over time and less to carry around.

Edit: here's one of those step up sets:
lens filter Step up ring set 49-52-55-58-62-67-72-77mm - (eBay.ca item 320190658910 end time 08-Dec-07 19:10:25 EST)

and a good CPL Example:
Hoya 77mm Cir-Polarizing Filter 77 CPL NEW - (eBay.ca item 140185658224 end time 11-Dec-07 06:26:16 EST)

But I woudn't buy the CPL on Ebay. Too many knock off versions out there. Look for one on B&H's site or elsewhere


Last edited by Peter Zack; 12-08-2007 at 02:36 PM. Reason: more info
12-08-2007, 02:26 PM   #9
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It's cheaper if you buy the biggest filter size you'll need then just buy adapters to make that filter fit your smaller lenses.
12-08-2007, 03:45 PM   #10
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QuoteOriginally posted by Peter Zack Quote
Sigma version like this lens:

Sigma - Lenses
I can testify for that lens. We picked it up and thanks to a store error, we got it for the same price as the cheaper non APO one.

Amazing lens for the money, IQ is good and the colours are very nice. Even like the bokeh it produces
12-08-2007, 04:36 PM   #11
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Cokin | 77mm Circular Polarizing Glass Filter (Round) | CCC16477

That's probably the most expensive one I can afford. Is that overkill though? Then, for the step down rings, I'd need to get several, right, one for each step so it gets down to the 52mm that I need?
12-08-2007, 05:04 PM   #12
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Yes that's a good filter and you'd need to use a few step rings to go fron 77 to 58. But then it helps shade the lens as well like a hood. Then you only have to buy one lens and one set of rings.
12-08-2007, 06:37 PM   #13
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Alright, thanks. That's next on my list and a camera bag. Then, I'll probably buy another lens.
12-08-2007, 07:59 PM   #14
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go HERE and get at least the hoya HMC quality. hoya makes different quality filters as do others.
yes they cost more but why put a POS filter on a good lens?? IQ will suffer..
12-10-2007, 02:51 PM   #15
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Tamron 70-300mm Di Lens Kit for Pentax K10D K100D Super - (eBay item 350004653693 end time Dec-20-07 09:02:11 PST)

Is this the Tamron that Peter_Zack recommended?
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