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03-11-2007, 01:23 PM   #1
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Advice please: Have K10D - Pentax 50-200 + teleconverter or Sigma 70-300 APO DG?

Hi:

I just bought a K10D. I'm looking to complement the kit lense with either a combination of a Pentax 50-200 plus a teleconverter or go with a Sigma 70-300 APO DG for general purpose photography. Haven't done much macro work in the past.

Which way would you go and why?

Also, if you think the 50-200 plus teleconverter is the way to go, which teleconverter?

Thanks.

03-11-2007, 02:12 PM   #2
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Just curious, what are you shooting that you would want to go past 200mm?
03-11-2007, 07:46 PM   #3
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i would go (have gone) with the sigma and the tele converter.. a kenko 1.5 works nicely..

as for the why.. do your own research.. i aint gonna play banter with a whole bunch of pentaxians who would go the other way..

trog
03-11-2007, 08:19 PM   #4
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I'd go the 70-300, because it will be faster.

03-11-2007, 08:51 PM   #5
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QuoteOriginally posted by bdavis Quote
Just curious, what are you shooting that you would want to go past 200mm?
Sports, wildlife and candid close-ups of people (I tend to take a lot of tight face shots - a lot of them when I travel, don't know them and don't want to invade their privacy too much).
03-11-2007, 09:58 PM   #6
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THat is a tough one. I have both the 50-200 and the Pentax 75-300 FAJ. The 50-200 is far better than any of the budget 70-300's I have tested including the Nikon 70-300 ED (tested on my D70), but the reach is far less and when you add the teleconverter you lose a stop and some optical quality.

For your uses, I think the 50-200 is better for candids and tight portraits because it is sharper, less obtrusive and has better range. Being able to go out to 50mm makes it better for environmental portraiture.

For wildlife the Sigma would be the clear winner because it is all about reach and the teleconverter slows things down too much on the Pentax. I use my 75-300 for wildlife for this reason.

Neither of these choices is ideal for sports due to the slow AF but the 50-200 is the faster option IMO, but I don't know how the teleconverter would effect that.

Hope that helps, I do tend to ramble though...I like to hear myself type.
03-12-2007, 11:15 PM   #7
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the sigma 70-300 apo dg macro is extremely capable. i've also used the pentax 50-200, and unless compactness is an issue for you i would go with the sigma... hands down.
03-13-2007, 12:59 AM   #8
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QuoteOriginally posted by pax1231 Quote
Sports, wildlife and candid close-ups of people (I tend to take a lot of tight face shots - a lot of them when I travel, don't know them and don't want to invade their privacy too much).
Hmm...50-200 with a TC or Sigma 70-300 DG APO? You thought this out well. I'd go with your first option.

50-200 is a good lens. When you need to go into a room, the 50 might be just wide enough without the TC for some decent shots. TC won't slow down the lens too much in daylight. Besides, how often are you going to shoot headshots outdoors in the dark?

I found my FA 80-200 too long in a smaller room and kept getting the too tight, "HUGE HEAD" shot if you know what I mean. 70 will not be that much more different, but you will feel it going to 50 when the TC is removed.

03-13-2007, 05:19 AM   #9
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Sigma 70-300

QuoteOriginally posted by pax1231 Quote
Hi:

I just bought a K10D. I'm looking to complement the kit lense with either a combination of a Pentax 50-200 plus a teleconverter or go with a Sigma 70-300 APO DG for general purpose photography. Haven't done much macro work in the past.

Which way would you go and why?

Also, if you think the 50-200 plus teleconverter is the way to go, which teleconverter?

Thanks.
As I owned the Sigma in the past and returned it, I would not recommend it at all. Very soft beyond 200-mm and extremely slow. I suggest you look elsewhere for a solution. Perhaps the Pentax 50-200 would be a better solution, but without the tele-converter. Is 75-300 not long enough for you? That is what it translates to in 35mm format.
03-13-2007, 08:36 AM   #10
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a terrible lens is the latest sigma 70 x 300 apo dg.. here is a couple of cr-ppy soft examles useing mine for a candid face shot.. the pentax lens must be a lot better..

full frame image jpeg straight from my k100.. resized for posting useing irfanview



100% crop of the same pic.. cropped useing irfanview..



a moonshot useing the sigma and 2 x tele.. handheld.. jpeg.. 100% crop..



sorry guys but the pentax lens aint even in the same league.. its small which is its plus point.. but thats about it..

trog

ps.. sorry for the cr-ppy jpegs my k100 produces.. i must learn to shoot raw in future and start taking real pictures..

ps.. i must also apologize for attempting to back up my original post with some valid arguement as well.. opinions without back up aint worth a wot-sit.. just like an ass-hole everybody has one..

Last edited by trog100; 03-13-2007 at 08:53 AM.
03-13-2007, 09:21 AM   #11
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then of course we have the terrible 1:2 macro ability of the sigma from a couple of feet away..

full frame jpeg image



all in all the sigma is a classic lens and for the money it costs a steal.. it is helped along by the pentax in body SR thow.. the combination works well..

if i wanna have an opinion at least have one well..

trog
03-13-2007, 09:28 AM   #12
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I really like my 50-200 and have had a Sigma 70-300 in the past. I think that adding a TC to the back of hte DA lens would make it way too slow for shooting sports.

CW
03-13-2007, 09:59 AM   #13
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Consider the Tamron 70-300 1:2 macro as well...

I can't comment on the Pentax 50-200 or Sigma 70-300, since I haven't used them myself. But I can suggest that you also consider the Tamron 70-300 LD with the 1:2 macro capability. It's a relatively cheap lens, especially if you find one used as KEH like I did, but it does a great job for the price. The only drawback I've seen with it is that it has a tendency toward purple fringing if you have blown-out highlights next to dark shadows (e.g., shooting straight up into a tree with the dark leaves right next to a blown-out sky). I've only noticed this in one of my many photos with this lens, but it can happen.

-- Michael
03-13-2007, 10:26 AM   #14
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Great shots Trog, and nothing wrong with backing up assertions with proof. The contrast in these pics is outstanding for a budget zoom. These look slightly better than the results I got with the Nikon 70-300ED and wipe the floor with anything I achieved with my Tamron.

I am still testing my Pentax 75-300 but my initial results seem to indicate that it is the equal of the Nikon.

Testing lenses in the field is very difficult as lighting can vary from day to day and region to region and there are many variables, but here are two shots from my Pentax 75300

The first image is a 100% crop


Still getting used to panning with Pentax. Nikon's AF handled moving birds quite a bit better.


Last edited by arbutusq; 03-13-2007 at 10:32 AM.
03-13-2007, 05:53 PM   #15
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Very Nice

QuoteOriginally posted by trog100 Quote
then of course we have the terrible 1:2 macro ability of the sigma from a couple of feet away..

full frame jpeg image



all in all the sigma is a classic lens and for the money it costs a steal.. it is helped along by the pentax in body SR thow.. the combination works well..

if i wanna have an opinion at least have one well..

trog
Some really impressive images Trog..I love the close up of the Swans .My Sigma 70-300 was a Canon mount and I seemed to have issues over about 170 mm. It was taken in to be re-chipped. It was better but still problematic. I had a similar problem with the Sigma 70-200 2.8 which worked great on one body and not on another, both Canons. I sold it even though I wanted it to be the lens it can be on some bodies. Perhaps it had more to do with the fact that I didn't test a few lenses and just got one bad copy. None the less your images prove to me that you are not having any of the issues I did.
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