Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-17-2010, 01:19 PM   #1
Site Supporter
sholtzma's Avatar

Join Date: Sep 2007
Location: Salisbury, NC
Photos: Gallery | Albums
Posts: 1,014
replacing my Bigma

Well, I have had the Sigma 50-500mm lens for some years now, and I have appreciated its capabilities. But I find myself using it less, both because of its bulk/weight/length and its image quality (which is good but not superb).

Should I send the lens in to Sigma for adjustment, and hope the IQ problem is more a matter of poor adjustment?

Should I accept that, for long focal length reach, it is as good as I am going to get, unless I win the lottery and can put $5000-10,000 into a 400mm f2.8 or 600mm f4?

Should I sell it and use the money to pick up another (better) kind of long focal length lens? If so, what? the Sigma 100-300 f4?

Any help appreciated. I feel stuck.

03-17-2010, 02:51 PM   #2
Forum Member
Uncle_dad's Avatar

Join Date: Mar 2009
Location: Edgewater Maryland
Photos: Gallery
Posts: 89
I took along time to decide which lens to get and picked the 100-300 F4 Sigma. But I don't think its that much lighter or smaller then the Bigma. It does take great pictures though. I also got the 1.4 TC but haven't used it much. It uses a 82mm filter. It sits very well on a tripod with the removeable foot. I would suggest you check out the size part of it because I am pretty sure you would find the IQ of the 100-300 very good. I picked mine up from Adorama but they come up on the used market often, but at so close to full price I just went with a new one. Good luck !!!!
03-17-2010, 03:10 PM   #3
Veteran Member
Ben_Edict's Avatar

Join Date: Jul 2007
Location: SouthWest "Regio"
Photos: Albums
Posts: 3,303
QuoteOriginally posted by sholtzma Quote
Well, I have had the Sigma 50-500mm lens for some years now, and I have appreciated its capabilities. But I find myself using it less, both because of its bulk/weight/length and its image quality (which is good but not superb).

Should I send the lens in to Sigma for adjustment, and hope the IQ problem is more a matter of poor adjustment?

Should I accept that, for long focal length reach, it is as good as I am going to get, unless I win the lottery and can put $5000-10,000 into a 400mm f2.8 or 600mm f4?

Should I sell it and use the money to pick up another (better) kind of long focal length lens? If so, what? the Sigma 100-300 f4?

Any help appreciated. I feel stuck.
Obviously the choice is yours, but I will freely distribute some thoughts:

If you need the reach of the Bigma (app. 500mm fl), you would need to add a tc to the 100-300/4, which after all will degrade its otherwise superb IQ and also will make it similarily slow as the Bigma is. I am not sure, this will offer any advantage for you.

If you feel disappointed with the IQ of the Bigma, I can hardly imagine, that the IQ simply "degraded" over time, unless it had a fall or other misfortune. So, assuming the lens is fine, your gained experience and higher expectations, that come with experience, may simply have reached the limits of what the Bigma can deliever. In that case, I would suggest you should forego zooms and go into the prime lens direction. (I won't rule out, you got a sub-optimal copy, though.)

The Pentax DA 300/4 has a very good reputation and can be used with the Tamron 1.4x tc with excellent results, as many, many example images on this site proof. Also the Sigma 300/2.8 would be a possibllity, as it matches with the two Sigma tcs to give you a very versatile combination (300/2.8 - 420/4 – 600/5.6). I personally love my 300/2.8 (though not a Siggi, but an ancient Tamron), but still use the Bigma more often…

Something in the middle would be a 400/5.6 lens. From time to time you may find a Pentax FA version on ebay (2,500 USD or so) or (if you are willing to manually focus) a Pentax smc-A would also fullfill the bill in terms of IQ for much less money (around 500-700 USD). I have the A-version and it is a very fine and capable lens, which I find even sharper than the praised A* 300/4, despite its lacking of the *-denomination.

Ben
03-17-2010, 03:26 PM   #4
Pentaxian




Join Date: Feb 2010
Location: Eureka, CA
Photos: Gallery | Albums
Posts: 1,888
QuoteQuote:
Should I send the lens in to Sigma for adjustment, and hope the IQ problem is more a matter of poor adjustment?
Have you noticed a degredation of the IQ over time? Or is it merely that you've become more critical over time? Sometimes we simply outgrow our lenses. As our skill as photographers increases, we develop a more critical eye and begin to notice defects in our consumer grade glass that didn't bother us before. If this is what's happened in your case, then it's time to move on.

QuoteQuote:
Should I sell it and use the money to pick up another (better) kind of long focal length lens? If so, what? the Sigma 100-300 f4?
If you need the entire focal range of the Sigma, it's an excellent choice. But if you think you'd mostly be using the lens at the long end of the zoom, the Pentax DA 300 f4 would be a better choice.

03-17-2010, 03:52 PM   #5
Site Supporter
sholtzma's Avatar

Join Date: Sep 2007
Location: Salisbury, NC
Photos: Gallery | Albums
Posts: 1,014
Original Poster
You folks have raised relevant questions that I should have addressed in my original post.

No, I do not have reason to believe that the Bigma IQ has degraded over time. I NEVER felt it was all that great. Does that suggest a "sub-optimal copy"? Or am I (and was I) simply expecting too much IQ for a (now somewhat old) 10x superzoom? Would it cost much to send it in to Sigma for the camera equivalent of a "CLA"?

No, I do not typically use Bigma for its zoom range as much as for its reach. It's the 400-500mm reach that I crave. So, yes, a prime in that range would be an option. I figure I could sell Bigma for somewhere in the (what?) $750-850 range. How much more would I have to invest? I confess that a 300 f2.8 sounds tempting, if for no other reason than the glass in the constant 2.8 large zooms tends to be the best, having been designed mostly for pros who expect excellent IQ even wide open.

I already have a Sigma 1.4x tc. But I don't mind switching brands to a Tamron or some other.

Wish I could afford Pentax primes, but at those focal lengths there are very few copies and they are out of my financial reach.
03-17-2010, 04:40 PM   #6
Veteran Member




Join Date: Jun 2009
Photos: Albums
Posts: 1,679
FYI, I would add that the newly announced version of the Bigma:

New Sigma 50-500 OS Zoom Lens photo from the PhotographyREVIEW.com Gallery

Note it's NOT an EX build. So it will have only a 1-yr warranty. I gave up my Bigmos for the same reason...I liked the lense a lot but given only a 1yr warranty I sold in within the first year after having some fun with it. Big lenses = heavy glass and lots of potential to fail for the OS as well as AF.

So, if you are even somewhat seduced by the new OS version Bigma, just take that into consideration. I know I was surprised.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
adjustment, f4, k-mount, length, lens, pentax lens, sigma, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Replacing a 85/1.4 with a 77mm Ltd? jpzk Pentax SLR Lens Discussion 14 03-24-2010 05:40 PM
Replacing 350D with K-X and need some advice... lollavid Photographic Technique 6 01-25-2010 03:33 PM
Replacing stolen cameras geauxpez General Talk 21 09-29-2008 05:04 AM
Replacing a spotmeter, Spotmatic Don Nestor Pentax Film SLR Discussion 7 02-24-2008 08:43 PM
Replacing Lens Mounts Lowell Goudge Pentax SLR Lens Discussion 16 10-01-2007 07:41 AM



All times are GMT -7. The time now is 10:34 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top