Wide Angle Zoom Lens Choices for Pentax K10D to supplement old film SLR lenses

Started Aug 9, 2010 | Discussions thread
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jlp3630 New Member • Posts: 16
Wide Angle Zoom Lens Choices for Pentax K10D to supplement old film SLR lenses

I'm fairly new to the digital SLR world. My previous camera was the Canon Powershot SX10IS, and I just bought a factory refurbished Pentax K10D body from Best Buy. I have the following lenses from my dad's old film SLR (Pentax K2):

1. Promaster Spectrum 7 28-70 mm, 1:3.5~4.5
2. Promaster Spectrum 7 70-210 mm 1:4~5.6
3. Pentax 1:1.2/50
4. Pentax 1:3.5/24

I plan to shoot some fast moving subjects (i.e., students at a graduation ceremony), but I wouldn't say that I do a lot of it. At this point, I'd probably consider myself a "general" photographer with no specific subject matter type that gets photographed a lot.

I was looking to purchase a wide angle zoom lens to complement the above lenses. I looked through Adorama's site and found the following 4 lenses:

1. Pentax SMCP-DA 16mm - 50mm f/2.8 ED-AL (IF) SDM Autofocus Zoom Lens for Digital SLRs

2. Sigma 17 - 50mm f/2.8 EX DC OS HSM Auto Focus Wide Angle Zoom Lens

3. Tamron SP AF 17-50mm f/2.8 XR DI-II LD Aspherical (IF) Standard Zoom Lens

4. Sigma 17-70mm f/2.8-4 DC Macro OS (Optical Stabilizer) HSM AutoFocus Super Wide Angle Zoom Lens for Pentax AF Cameras

Does anyone have opinions on what lens to get? While the Pentax lens is the most expensive, I don't want price to be the driving factor towards making a decision. I'd rather just buy a lens once as opposed to buying/reselling lenses as personal preferences/budget change.

Regarding the Sigma 17-70mm lens, I'm not sure if it's a good idea to get a lens that's lacking in the 24-50mm range (i.e., the lens is f/3.5 from 24-50mm) to get the additional 50-70mm range at f/4. Given the lenses that I currently own, I'm not sure if the range overlap would make the Sigma 17-70mm a bad choice.

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