Sponsor Message:
Aviation Photography Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Anyone Know About The Sigma 170-500 F/5-6.3 APO?  
User currently offlineJakTrax From United Kingdom, joined Jun 2005, 4936 posts, RR: 7
Posted (3 years 4 months 5 days 18 hours ago) and read 5292 times:

Hi all,

A friend of mine - who incidently isn't computer-qualified enough to do this himself - has asked me about the above lens and to be honest I haven't a clue!

I did a quick search and I know the lens is discontinued; most likely replaced by the 150-500. I also know that it isn't an EX, and it doesn't offer HSM, so I've no idea what quality he can expect. How is the lens generally? Same build, etc. as the Bigma and 150-500? Results on a par?

Cheers,

Karl

2 replies: All unread, jump to last
 
User currently offlineyankeezephyr From Australia, joined Sep 2008, 14 posts, RR: 0
Reply 1, posted (3 years 4 months 2 days 22 hours ago) and read 5167 times:

Hi
I have that lens for Pentax and I find it's hot and cold (I'll blame the equipment here   )

Seriously, I have found it's not very forgiving, but once you work out what it's truly capable of, it gives some good results

I have used it for spotting on a few occasions, and have been happy with it up to about 400, over that and it's definitely soft
I have also found it's optimum f-stop is around f8 to f13, below that and it's soft, above that and the only word I can use to describe it is 'funky'
Also, on the Pentax it slow, very slow, to focus
So it's not really ideal for jet displays, spitfires, or anything that moves at a reasonable clip

I have found it's great to attach to a tripod, and take photos of the moon, or anything else that is, relatively, not moving

Interestingly, I found it gives great results when it's coupled with a Kenko 2X converter, where the auto focus works fine between 170 and about 300, and is then sporadic above that. It also seems to be sharper than without

It's built well, though, but is pretty heavy
I have found that manually focusing it can be a mission due to the weight, so you do rely on AF a lot

I have seen on other forums that the Bigma is definitely better all round, and streets ahead when it comes to IQ
I understand that the 150-500 is much the same

The biggest issue I have with it is, I guess due to the weight of the front elements, it will extend to full zoom in about 3 seconds if you hold it at any angle past horizontal (it moves so fast you can hear the 'thunk' as it gets to the end)

If I were to buy again, knowing what I do now, I'm not sure I would buy it again, but would probably spend the extra on the 50-500

If you are after anything more specific, let me know

Paul


User currently offlineJakTrax From United Kingdom, joined Jun 2005, 4936 posts, RR: 7
Reply 2, posted (3 years 4 months 2 days 13 hours ago) and read 5104 times:

Thanks for the reply - and also to 'the other guy' who pm'd me (you know who you are).

Karl


Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
Sigma 170 500 Mm APO Lens posted Fri Mar 19 2004 23:09:50 by Ryan h
Anyone Use The Sigma 170-500mm W/300D Or 10D? posted Sun Jan 25 2004 07:28:29 by Maiznblu_757
Anyone Know About This? posted Mon Dec 24 2007 15:09:20 by EZEIZA
Sigma 170-500... Opinions? posted Tue Jan 10 2006 20:41:57 by Andz
Canon 300D + Sigma 50-500 APO ...experience!? posted Mon Dec 27 2004 14:27:50 by Wernair
D30 & Sigma 170-500 Focusing Issue posted Wed Apr 14 2004 07:28:27 by Manzoori
Anyone Here Using The Sigma SD9? posted Sat Jun 28 2003 02:04:49 by Patroni
Sigma 150-500-experience Anyone? posted Wed Aug 27 2008 12:21:41 by IwantaBBJ
Anyone Know The # Of Photographers On This Site? posted Wed Oct 22 2003 18:37:00 by Gmonney
Anybody Know Anything About The ZX-60 posted Fri Oct 25 2002 05:38:51 by L-188