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04-09-2008, 09:46 AM   #16
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ArturMalyPL
The Sigma 70-200 with the 1.7 TC gives 340mm total. here are some quick test shots all hand held and all at wide open:

Sigma 70-200 f2.8

Sigma 70-200 100% crop

Sigma 70-200 with 1.7 TC

Sigma 70-200 with 1.7 TC 100% crop

Sigma 500mm f6.7 (the Bigma is wide open at 6.7 on a Pentax)

Sigma 500mm 100% crop



Last edited by Peter Zack; 04-09-2008 at 10:29 AM.
04-09-2008, 09:55 AM   #17
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Just for fun I added the 1.7 with the Bigma (850mm total) and shot this handheld wide open. The neighbours are beginning to wonder .



This of course could be better with a tripod or some other support but it's possible if you want some extreme close ups from a distance.

No sharpening or anything else was applied to these (other than resizing) So there's more that could be done to sharpen the shots.

You'll notice with the Sigma 70-200 that it's soft except the exact focus point when wide open and adding the 1.7TC sharpens the image up even though it's still wide open. This lens gets very sharp when stopped down one stop and below is a shot at 1/200th f10 @200mm without the 1.7TC



100% crop 1/200th f10 @200mm

Last edited by Peter Zack; 04-09-2008 at 10:38 AM.
04-09-2008, 02:16 PM   #18
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I should add that the Bigma is a bit soft at the extreme ends and you can see that here when it's wide open. Like the Sigma 70-200. If you stop it down a little, it sharpens up nicely. Also if you pull it back to 470-480mm you will get better results.
04-09-2008, 06:04 PM   #19
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You might want to consider A 135-400mm sigma or 80-400mm tokina. Both are 5.6 at the 400mm end and 4.5 at the short ends. Not sure how much use it would get at a wedding but it may be just long enough and just fast enough to get the ring shot up close with out intruding on the couple. Here are some shots I took with mine (135-400mm Sigma) last weekend, outdoors of course. https://www.pentaxforums.com/forums/post-your-photos/24570-sigma-135-400mm-waterfowl.html If you're interested, I might be inclined to take some low light shots indoors and post them and the settings for you? Shoot me a PM if you are interested. I think the ultimate lens would be the 120-300mm f2.8 by sigma. Unfortunately, they dont make it in Pentax mount. A 2x tele added would make it a 600mm f5.6!!! Check it out, only $3,500 :-)
Sigma - Lenses

04-09-2008, 06:47 PM   #20
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The 12-300 would be a great lens to own for wildlife etc but not for weddings. At 2.6 Kg it's 800 grams heavier than the Bigma. That's to be expected with a zoom of this range and this fast. Shooting a wedding is an all day affair and except for some portraits, and a stationary setup in the church if you're lucky, everything is hand held. Carrying either lens this heavy + body + grip + Flash +++. IMO that's nuts.

The 70-200 f2.8 is plenty long enough and big enough at 1.39 Kg to carry around all day.
04-10-2008, 12:42 AM   #21
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bump

i need to do some more research on what i see here, i guess.....


but im thinking:
i have this cheap ole sigma 70-300...it's 6.3 at the long end and that is what I shoot the hands with during the ring exchange...all the way at three hundred.
so with the 150-500 ill be at more like 5.6 and i'll be better off.


is there another 135+ focal length that will comliment the 16-50, 50-135 lineup?
04-10-2008, 12:44 AM   #22
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p.s.
i have shot about 60 weddings and i know church conditions have totally perfect and beautiful lighting (haha....)

but i want something that i can use to shoot the first kiss from the same place i shoot the virgin mary from.....

please god, let me find a 200-400 2.8
04-10-2008, 03:28 AM   #23
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Well if you really need that kind of length then reknelb had the right lens for you. Add a 1.4x TC and you're set. (420mm). Any lens this length will be big and heavy. There's no way around the physics of that. It will also be expensive but 3-4 weddings will pay for it. So ignore my previous post.

04-10-2008, 01:16 PM   #24
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Just thought I would add this. I also have the Sigma 70-200mm f2.8, its about the same size and weight as the 135-400mm f5.6. Only when I extend it out to 300-400mm is it noticeably longer than the 200mm f2.8.
04-10-2008, 04:23 PM   #25
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sorry i cant really contribute anything else yet because instead of researching, i acquired a hangover 8(

but i do have a question.
does anyone have a pentax 50-135 AND a sigma 70-200 2.8.

I would like to spread my money out effeciently over the focal range I acquire...I'm going to feel sick if I spend over a grand on that much overlap, ya know?
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