Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-16-2014, 08:25 AM   #1
Senior Member




Join Date: Mar 2014
Photos: Gallery
Posts: 153
advice on lens purchase

I want to purchase an other zoom lens I have been looking at the ( Sigma 18-250mm F3.5-6.3 DC Macro HSM Pentax )
or should I stick to my original plan and get the ( HD Pentax-DA 55-300mm F4-5.8 ED WR )


which would be best IQ for my K3 I know there is a zoom difference but Its IQ I want
so could the users of the above lens please advise me
Thanks
Tom G

06-16-2014, 08:37 AM   #2
Loyal Site Supporter
TER-OR's Avatar

Join Date: Apr 2009
Location: Dundee, IL
Photos: Gallery | Albums
Posts: 5,571
The 55-300 is the better long zoom. Bear in mind its minimum focus distance is around 5 feet - but it's a long zoom afterall...

The Sigma 18-250 is a "superzoom" and fair as a walkaround but not so strong on the long end.
06-16-2014, 08:53 AM - 1 Like   #3
Site Supporter
jimr-pdx's Avatar

Join Date: May 2010
Location: 1hr north of PDX
Photos: Gallery | Albums
Posts: 3,491
Our advice is the same on all lens purchases: "do it now, post pics, buy another one!"

I own the 18-250 and it's quite nice for several reasons I can think of - silent focus, big range, close focusing (nearly 1/2 life size). It's my primary zoom when I need shots fast.

But if it's telephoto IQ that you are choosing for, the 55-300 in any form is a consistently great lens and worth owning.

So both have their place but for different reasons - how's that for a vague answer?
06-16-2014, 09:57 AM   #4
Senior Member




Join Date: Mar 2014
Photos: Gallery
Posts: 153
Original Poster
QuoteOriginally posted by jimr-pdx Quote
Our advice is the same on all lens purchases: "do it now, post pics, buy another one!"

I own the 18-250 and it's quite nice for several reasons I can think of - silent focus, big range, close focusing (nearly 1/2 life size). It's my primary zoom when I need shots fast.

But if it's telephoto IQ that you are choosing for, the 55-300 in any form is a consistently great lens and worth owning.

So both have their place but for different reasons - how's that for a vague answer?
Thanks Ter-ror and Jimr-pdx

for the quick reply's it looks like the 55-300 then
this is a great forum for getting answers and one's problems solved I love it
Tom G

06-16-2014, 10:26 AM   #5
Pentaxian
Na Horuk's Avatar

Join Date: Feb 2012
Location: Slovenia, probably
Photos: Gallery | Albums
Posts: 10,507
The HD 55-300mm is also WR, and its always great to have a WR zoom on hand.
06-16-2014, 07:22 PM - 1 Like   #6
Pentaxian




Join Date: Apr 2007
Location: Oklahoma USA
Posts: 1,480
An issue with the 18-250, and most other superzooms, is that the maximum aperture starts dropping like a rock once you leave... seemingly 18mm. The 55-300 Pentax (and 70-300mm Tamron for that matter) have maximum apertures that hold up pretty well through the zoom range. If you can get a good copy of the 55-300, which can be a challenge, you'll have a very good lens - probably the best consumer-zoom for Pentax in that range.
06-16-2014, 08:50 PM   #7
Site Supporter




Join Date: Feb 2011
Posts: 4,892
A lot of the time, when you're at 300mm, you really want to be at 600mm.

The 300 is going to be 10-20% sharper than your 250 options, coupled with being 20% longer, means you're looking at, say, 30% better resolution, and the 55-300 is a bit faster too.

I have a 55-300mm. It's great. I don't have a 18-250, and I'm not going to purchase one.

Worth it to you? Dunno.
06-17-2014, 06:43 AM   #8
Senior Member




Join Date: Mar 2014
Photos: Gallery
Posts: 153
Original Poster
QuoteOriginally posted by ElJamoquio Quote
A lot of the time, when you're at 300mm, you really want to be at 600mm.

The 300 is going to be 10-20% sharper than your 250 options, coupled with being 20% longer, means you're looking at, say, 30% better resolution, and the 55-300 is a bit faster too.

I have a 55-300mm. It's great. I don't have a 18-250, and I'm not going to purchase one.

Worth it to you? Dunno.
Hi again This is an update on my thoughts about lens and advice is much appreciated Thank You all.
I have been looking at the lens reviews over the past 24hrs ( I've got lens coming out of my ears )


Here's what I'm thinking after much time looking and reading reviews on the lens section of this forum I have been leaning towards the Tamron 70mm 200mm, and also for portraits the,
SMC Pentax DA40 F2.8 Ltd I think these lens would give better image quality, I have a couple of lens on EBay and I have sold one just waiting on the other one to go then I will have enough funds


what do others think of the Tamron 70 x 200 I can get it for 500 and the DA40 at 150


sorry to be an undecided I suppose that's why my mother called me Thomas (doubting Thomas )


Thank you all for the replies Tom G

06-17-2014, 07:38 AM   #9
Site Supporter




Join Date: Feb 2011
Posts: 4,892
Love the Tamron 70-200.

Generic reviews on the web knock the af speed. The lens has terrible af speed on nikon bodies but quite good on pentax bodies.
06-17-2014, 08:19 AM   #10
Senior Member




Join Date: Mar 2014
Photos: Gallery
Posts: 153
Original Poster
QuoteOriginally posted by ElJamoquio Quote
Love the Tamron 70-200.

Generic reviews on the web knock the af speed. The lens has terrible af speed on nikon bodies but quite good on pentax bodies.
Thanks ELJamoquio yes I have been looking at YouTube videos on the lens
Tom G
06-17-2014, 07:02 PM   #11
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 8,085
I love my 70-200. f2.8, and you're rewarded on Pentax: the screw drive is fast enough for sports.
06-18-2014, 02:15 AM   #12
Senior Member




Join Date: Mar 2014
Photos: Gallery
Posts: 153
Original Poster
QuoteOriginally posted by clackers Quote
I love my 70-200. f2.8, and you're rewarded on Pentax: the screw drive is fast enough for sports.
Thanks clackers,
Yes I have read some reviews about the AF being slow on the Tamron 70mm 200mm but it does not put me off I know the IQ is very good and that's what I want, not many lens are perfect
as you say on the k3 it should work well enough for me
Tom G
06-18-2014, 03:28 PM   #13
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 8,085
QuoteOriginally posted by Tom777 Quote
Thanks clackers,
Yes I have read some reviews about the AF being slow on the Tamron 70mm 200mm but it does not put me off I know the IQ is very good and that's what I want,

Tom, it's a bright lens which helps AF, and using the camera's lens motor means it may be faster than the Sigma 70-200.
06-18-2014, 04:59 PM   #14
Pentaxian




Join Date: Apr 2007
Location: Oklahoma USA
Posts: 1,480
QuoteOriginally posted by clackers Quote
Tom, it's a bright lens which helps AF, and using the camera's lens motor means it may be faster than the Sigma 70-200.
At least in theory, the screw-drive autofocus lens speed can improve with every new camera generation. Maybe with another couple rounds of improvements, somebody will market an adapter that turns your camera body into an impact wrench.
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!
advice on lens, camera, iq, lens, pentax help, photography, purchase
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Advice needed on recent purchase of damaged lens davidreilly3207 Pentax SLR Lens Discussion 12 12-03-2013 07:44 PM
Advice sought on Amazon Sigma lens purchase candgpics Pentax SLR Lens Discussion 5 06-23-2013 08:32 PM
Advice on Lens Purchase hoovs Pentax SLR Lens Discussion 8 12-21-2012 10:24 PM
Advice on zoom lens purchase psoo Pentax SLR Lens Discussion 40 02-29-2012 12:49 PM
Need advice on lens purchase George Lama Pentax SLR Lens Discussion 7 08-29-2007 09:54 PM



All times are GMT -7. The time now is 10:30 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