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02-23-2008, 02:24 AM   #46
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These are my shots from aquarium, taken with SIGMA 24-70 EX DG and K10D. I've used ISO800, 1/20 sec exposure and f/8.0 aperture.

02-23-2008, 03:45 AM   #47
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Kamil, that shot of the anemone is particularly nice, especially considering the slowish exposure time.
02-23-2008, 04:05 AM   #48
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Yeah! SR in K10D is amazing! Just for Tamron 28-75 enthusiast: Sigma has got slightly faster AF!
02-23-2008, 09:49 AM   #49
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QuoteOriginally posted by Camilsky Quote
Just for Tamron 28-75 enthusiast: Sigma has got slightly faster AF!
Actually, I noticed this, but thought I was imagining things.

02-23-2008, 05:14 PM   #50
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Heather's lens usage analysis over 2 days...

QuoteOriginally posted by hwblanks Quote
I myself am looking at either getting the Tamron 17-50 (when it comes out) or a combination of the DA21 + Tamron 28-70. I'm a little torn at the moment as to which one I want to get, as there are definite pluses and minuses to each choice. Later on this week, I'm going to have a couple of days where I'm going to get to spend more time with the camera and kit lens and be able to better evaluate which focal lengths I'm using. If they tend to go more towards the wide end, then that 17-50 would be the obvious choice, but if they're more towards the long end, then the 21 + 28-75 combination would work better.
After an outing to the Butterfly Rainforest yesterday and to Cedar Key (a little island off the Gulf coast of north central Florida) today, I ran an ExposurePlot report to analyze what lengths I tended to use the most. I found that I used the 80mm and 60mm equivalents (about 55mm and 40mm) significantly more than I used anything else--38.19% at 55mm and 19.1% at 40mm. At the wider angles (18-35ish), I used all of them together for a grand total of 5.53% of my shots.

From what I can tell, it looks like that the 28-75 would fit the bill as a good walk-around lens. One thing I definitely noticed today is that I could've used the extra 20mm on the tele end--that's why so many of my shots were at 55--it simply wouldn't go any further. I still would want something wider to cover the occasion where I would want a wide, but even then, I've still got the 18-55 that would work for that until I could get a better wider lens.

Those 28-75 images blow me away!

If any of you have different thoughts, I'm still open to other ideas...

Thanks!
Heather
02-24-2008, 11:25 AM   #51
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I was looking at this lens as well on B&H, and though it says "for pentax DSLRs" i just want to make sure before i pull the trigger and get it, it will go onto my K100D Super. Anyone know (from personal experience), or know where I could find out?
02-24-2008, 11:33 AM   #52
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QuoteOriginally posted by Morbo Quote
I was looking at this lens as well on B&H, and though it says "for pentax DSLRs" i just want to make sure before i pull the trigger and get it, it will go onto my K100D Super. Anyone know (from personal experience), or know where I could find out?
Yes, it will go right one. Fits like a glove.
02-24-2008, 02:02 PM   #53
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This lens definitely interests me..

However I also did a little reading on the Sigma 24-60mm f2.8 and it seems to have a more ideal focal length for me/a little bit wider.. Very hard to find info on it/Pentax users of this lens though for whatever reason.

02-24-2008, 02:30 PM   #54
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QuoteOriginally posted by frogger Quote
This lens definitely interests me..

However I also did a little reading on the Sigma 24-60mm f2.8 and it seems to have a more ideal focal length for me/a little bit wider.. Very hard to find info on it/Pentax users of this lens though for whatever reason.
I have the Sigma 24-70mm f/2.8 and it is a fine lens, but give the nod to the tamron.
02-24-2008, 03:07 PM   #55
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some funky first pics..

I got it, but it has been raining....... But you still got to shoot something right?...

The OOF areas look pretty good. And it is fairly sharp wide open... I have had a bit of an issue focusing some times at 28mm f2.8, I found if I zoom out and get focus and then zoom back I always get a better focus. I know that happens with some zooms and I hope I will figure out a better work around.

Nothing special here but thought I would post em up anyway. This seems like it will be a fun lens.
Attachment 8821

Attachment 8822

Attachment 8823

Attachment 8824

Attachment 8825

Last edited by Igilligan; 06-20-2008 at 10:19 AM.
02-24-2008, 03:42 PM   #56
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Wow... I'm really loving the bokeh coming out of this thing (re cat and the first girl pictures)
You're all going to drive the value up
02-24-2008, 06:39 PM   #57
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QuoteOriginally posted by jgredline Quote
Yes, it will go right one. Fits like a glove.
fantastic. thank you!
02-25-2008, 08:17 AM   #58
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Gus - Those shots are great! I always loved the bokeh of my Tamron. I miss it (sniff sniff) I'm currently using the EF-S 17-85mm f/3.5-5.6 IS USM and while it's decent (AF is REALLY fast) it optically pales in comparison to my Tamron. I'd get the Tamron for Canon, but it doesn't have USM so the AF performance isn't as good. I think I'll just save my pennies for the 24-70mm L.

Enjoy the lens! -Evan
02-25-2008, 10:22 AM   #59
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Hi Evan

Hey Evan, thanks for the kind words. I am liking the bokeh just fine. Struggling a bit with AF at the wide end, but hopefully I will get it down.

Funny you should mention the 24-70L glass. I had a pro photog shooting the event I was managing last weekend. (I always chat up the pros when I have them trapped in my building)

Anyway, he had that L glass on his camera and after I asked him about it and told him I had just ordered the 28-75 for my pentax, he let me fire off a few shots with it. Man, in dim lighting it was amazingly fast... but I would guess the cost of the camera/lens/flash combo at $4000 ish, so it had better be fast. But what a nice lens. If you are saving your pennies for it then, may I suggest a penny drive. Get the family and friends to donate their old pennies to the cause....

So here I was with my little pentax and heavy old vivitar series 1 macro (MF) hanging from my neck, holding this pro gear. I had never felt more like a ___________. I thanked him and then went about shooting a few shots with my camera. After I got home and dumped them onto the computer I actually had a few that I liked and felt much better about my K100d and old MF lens.
Attachment 8873

Actually it was hard taking the Vivitar Series 1 off of the camera to put on my new 28-75... I really like that 105mm lens, the most fun of any of my old lenses.
But I need to put the 28-75 thru its paces and It looks like the weather may let me today..
Thanks again for the comments and good luck with the penny drive.

Last edited by Igilligan; 06-20-2008 at 10:19 AM.
02-25-2008, 05:03 PM   #60
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^^what the heck? Is that donut bokeh?!
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