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09-06-2007, 09:23 AM   #1
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Sigma lens choices - Which one for K10D?

I'm looking to replace my Sigma 100-300mm DL with two new lenses and wondered what you all thought about these below.. If you could offer your opinion, maybe a sample photo, etc, I would greatly appreciate it.

My choices for up to 300mm..

1) Sigma 28-300 mm f/3.5-6.3 DG Macro Zoom



2) Sigma APO 70-300 mm f/4-5.6 DG MACRO Telephoto Zoom



3) Sigma 70-300 mm f/4-5.6 DG Macro Telephoto Zoom Lens



My choices for up to 500mm..

1) Sigma APO 170-500 mm f/5-6.3 DG Telephoto Zoom Lens



2) Sigma APO 50-500 mm f/4-6.3 EX DG HSM Telephoto Zoom Lens



09-06-2007, 11:13 AM   #2
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Why might I ask are you replacing the Sigma 100-300? That's one of the sharpest lens that Sigma has to offer in its collection and at a constant f4 you can tack on a 1.4x TC for even more reach. The 70-300's are alright, but would be a very big step down from the 100-300. The Bigma (50-500) is nice as well but can become reasonable soft at the long end and significantly heavier.

The 100-300 with a 1.4 TC will give you 420mm giving you a 630mm on a APS-C sensor. The bonus to the crop is that it trims out any weaker corner resolution that the lenses may produce (this helps the Bigma quite a lot because it's corner performance falls off further into the long end).
09-06-2007, 11:41 AM   #3
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I have the Sigma 100-300mm f4.5-6.7 DL.. Here is a review of my lens http://www.popphoto.com/assets/download/3302003194022.pdf

I know how to use the lens and I can produce excellent images with it however, I'm looking for something a bit better.

Since I don't often break out the 300mm I was thinking of selling it and replacing it with something that maybe offered a closer focusing distance and maybe a macro feature, but macro is not a must have.

I'd consider just buying the 50-500 or the 170-500 and forgetting about a second 100-300 etc lens but, the Bigmas are not really going to fit into a kit bag and I'd be bringing it specifically for a shoot. Hence the reason I'm looking to buy two lenses. The 100-300 size is fine for a kit bag and if I were to shoot sports or wildlife I'd probably just bring a 50-200 and one of the Bigmas.. Though for general purpose I always like to have some reach in my bag and the 300mm works well.
09-06-2007, 12:41 PM   #4
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Ahhh my bad, I missed the DL part for the 100-300.

If you're on a budget, the APO DG 70-300 is a fine lens and I owned one for a while shooting motorsports. As long as you've got sufficient light you'll do just fine with it.

For your 500mm end, hands down on the Bigma as the 170-500 isn't quite as good (plus the focal range just seems bland). As big as it is, it can really come in handy for times when you just want to bring a wide angle lens and the Bigma as your kit. I see a lot of guys at motorsports events shooting with it and it works well for them.

If you can find a 100-300 f4 in a Pentax mount (difficult now because they've been discontinued) I'd suggest that over the 70-300, but you will also be paying a little bit more.

09-06-2007, 01:09 PM   #5
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I don't know if it is still available, but you need to check the 70-200 F2.8 APO plus the 1.4x TC

This gives you an F4 100-300 mm Zoom, the option to go to the 2 x TC for 140-400mm F5.6, and is a stop faster at 300 mm than the 100-300.

Overall I believe it is a great option, plus without the TC you have 70-200 at F2.8.

The only reason I am not sure about availability is I have read receint posts that state it is not available in Pentax mount.

I bought mine in late 2003 with my *istD
09-06-2007, 08:12 PM   #6
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probably out of topic...

do you guys have a review of THIS lens?

sort of thinking it to be used as a walkaround lens...
09-06-2007, 08:59 PM   #7
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+1 for What Lowell Goudge said. I just love having fast glass to do available light shooting; and the TC gives you more reach when needed. I imagine that f/2.8 will maintain auto focus with the 2x TC as mine does to give you a 400mm f/5.6 if you ever need it; but (w/o TC) having f/2.8 throughout the zoom range shouldn't be minimized as that's the real advantage.

Last edited by m8o; 09-06-2007 at 09:07 PM.
09-07-2007, 12:45 PM   #8
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What about the SMC 300mm f4? It's an older lens but there seems to be an abundance of them. Any experience with that glass?

09-07-2007, 12:49 PM   #9
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With regards to that as a walk around lens.. I'm sure it's OK.

Personally, I use the DA 16-45 and the DA 50-200. Both offer up excellent color and sharpness and both lenses will work well for both people and buildings, etc. Just be careful using the 16-45 on people, they sometimes don't like how they look when you're real wide.. lol
09-07-2007, 01:26 PM   #10
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QuoteOriginally posted by Tom M Quote
What about the SMC 300mm f4? It's an older lens but there seems to be an abundance of them. Any experience with that glass?
I selectively ignored it because it is not sigma

Check todays posts in the lens forum, there is a little discussion about this specific lens
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