Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-27-2011, 02:49 PM   #1
Site Supporter




Join Date: Jul 2009
Location: Mount Joy, PA
Photos: Gallery | Albums
Posts: 528
Where can I find Tamon 70-300mm LD Di macro RAW files

I've been reading up on the Tamron 70-300 4.5-5.6 LD Di macro lately. A common complaint about this lens seems to be rather strong purple fringing in the typical high-contrast situations we all dread. Otherwise, this seems to be a rather good non-pro lens.

I'd like to play around with some RAW files produced with this lens - the camera body probably wouldn't really matter - but I haven't had any success locating such files.

Can anybody point me to a source for Tamron 70-300 4.5-5.6 LD Di macro RAW files? There is a newer VC (anti-shake) version of this lens, but that is not what I'm looking for, as it seems the optical formula is different.

Again, the camera body/brand isn't critical, though I suppose it would probably be better if the resolutions were in the 12-14MP range since that's closest to my K7.

Thanks in advance, Sherlocks!

01-27-2011, 03:19 PM   #2
Site Supporter
enoeske's Avatar

Join Date: Jul 2009
Location: Surprise, Az
Photos: Gallery
Posts: 1,888
I'm at work right now but I will upload one when I get home if nobody else steps up. Personally, I hate the lens. It seems semi-sharp but the purple fringing even stopped down to f/16 is ridiculous.
01-27-2011, 03:56 PM   #3
Veteran Member
fotaki's Avatar

Join Date: Aug 2008
Location: Greece and UK
Photos: Gallery | Albums
Posts: 309
Sorry I can't help much with the RAW files prob. - surely these will be created in the usual way irrespective of lens used - at least that's what my GX20 does. Suggest you look more closely in the setup menu.

Regarding the PF, I do not have a big problem with this with my copy. I have experienced PF of course but I've found that it largely disappears by about f/8. So, (unlike enoeske) it seems it can be a sample issue. I also use the Tamron AD2 60-300mm (manual) and, to be honest, there's not much difference in IQ between the two lenses. The older lens is sharper at 300 but there's pro's and con's for both.

BTW, there is a good group dedicated to this lens on flickr.

Last edited by fotaki; 01-28-2011 at 09:35 AM.
01-27-2011, 11:08 PM   #4
Site Supporter




Join Date: Jul 2009
Location: Mount Joy, PA
Photos: Gallery | Albums
Posts: 528
Original Poster
QuoteOriginally posted by fotaki Quote
Sorry I can't help much with the RAW files prob. - surely these will be created in the usual way irrespective of lens used - at least that's what my GX20 does. Suggest you look more closely in the setup menu.

Regarding the PF, I do not have a big problem with this with my copy. I have experienced PF of course but I've found that it largely disappears by about f/8. So, (unlike enoeske) it seems it can be a sample issue. I also use the Tamron AD2 60-300mm (manual) and, to be honest, there's not much difference in IQ between the two lenses. The older lens is sharper at 300 but there's pro's and con's for both.

BTW, (and It's not my normal policy to refer you elsewhere) there is a good group dedicated to this lens on flickr.
Thanks for the reference. I've been on flickr looking at some sample images, which generally seem pleasing.

As you can probably imagine, my purpose for getting some RAW files (or PEFs, so long as they're not JPEGs) is to see what can be done about unusually strong fringing. If it can be corrected well enough then this lens might work for me. I'm keeping my eyes open for any number of well respected xx-300mm lenses that are affordable. Ideally, I'd like to get my hands on an FA 100-300 4.7-5.8 some day. The price and performance seems right, and I can't afford the DA 55-300 unless someone wants to unload the DA L version and I can get the hood for a song - a lot of IFs in this equation.

Anyway, the Tamron seemed like an alternative, but not without its own weaknesses.

01-28-2011, 07:14 AM   #5
Veteran Member




Join Date: Mar 2010
Location: Hampton Roads
Photos: Albums
Posts: 336
I have an older non-Di version of this lens. The coatings are supposed to be different, so I don't know if my example will be useful. Is this unprocessed border crop at f8 a good example of PF? Let me know if you want the full DNG file.

I do agree that this lens is not very sharp, especially above 200mm.
Attached Images
View Picture EXIF
PENTAX K-7  Photo 
01-28-2011, 09:41 AM   #6
Site Supporter
Ahab's Avatar

Join Date: Jul 2007
Location: Oracle, Az
Photos: Gallery | Albums
Posts: 739
I don't have a problem with PF or lack of sharpness with my copy, but then I don't pixel peep. Seems those who have purchased recent versions don't either. I very rarely shoot RAW so can be of no help there.
01-28-2011, 11:05 AM   #7
Inactive Account




Join Date: Aug 2008
Location: Michigan, USA
Photos: Gallery | Albums
Posts: 7,485
QuoteOriginally posted by Kammerer Quote
I have an older non-Di version of this lens. The coatings are supposed to be different, so I don't know if my example will be useful. Is this unprocessed border crop at f8 a good example of PF? Let me know if you want the full DNG file.

I do agree that this lens is not very sharp, especially above 200mm.
The PF hasn't changed much from the non Di version judging from your photo however, the Di version is Much sharper than that. At least Mine was.

Lowvoltage,

I don't have many but if you want to see the RAWs from any of these, let me know which ones and I'll locate and upload them for you..

Show Tamron - a set on Flickr

01-28-2011, 02:10 PM   #8
Site Supporter




Join Date: Jul 2009
Location: Mount Joy, PA
Photos: Gallery | Albums
Posts: 528
Original Poster
Thanks, everybody, for your comments and offerings of help. I'm going to go ahead and take a pass on experimenting with RAW files from this particular lens.

If I didn't keep my LBA under control I very well may have simply picked up a copy of this Tamron. Fortunately, the more logical part of my brain has convinced me I don't even need this type of lens... for now. Still, if I can find that FA 100-300 I mentioned, I probably would buy it as all the reviews seem to be without major complaints.

01-29-2011, 10:28 AM   #9
Pentaxian




Join Date: Nov 2008
Location: Bangalore
Photos: Gallery
Posts: 2,435
You can checkout North East India - My Tawang & Bum La Trip - Company - Founded: May 21 - May 29, 2010 | Facebook, majority of pics using Tamron 70-300 LD Di (rest using sigma 10-20)

01-29-2011, 11:43 AM   #10
Senior Member




Join Date: Nov 2010
Posts: 138
Hey,

I uploaded a RAW sample at: http://ww.bobr.si/fotke/T70300.DNG
It's shot at f7.1, and there's some PF going on.

End of the day though, I like using this lens.
01-29-2011, 09:30 PM   #11
Veteran Member
KxBlaze's Avatar

Join Date: Feb 2010
Location: California
Photos: Gallery
Posts: 1,594
I like this lens. It is very sharp and has great color rendition but like you stated the CA can be a bit out of control. I notice it the most when shooting birds against a cloudy sky. There are a few techniques and PP things you can do to help reduce and in some cases completely remove the CA. The obvious first step it to try and shoot around F8-F10. As for PP I use photoshop and it has a dedicated CA fixing tool that is ok at best. Another forum member showed me a cool trick. You can sample the CA color and de-saturate it which will completely remove the CA but the down side is that it will also de-saturate anything that is the same color as the CA (other ways around that too but too long to explain).
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!
70-300mm ld di, camera, di, files, k-mount, ld, ld di macro, lens, macro, pentax lens, slr lens, tamron
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to save stitched RAW files to a RAW file? HermanLee Digital Processing, Software, and Printing 7 07-09-2010 05:51 PM
? about Asking for RAW Files SOldBear Photographic Industry and Professionals 35 03-21-2010 12:38 PM
RAW duplicate images - saving as RAW files jpzk Digital Processing, Software, and Printing 17 02-15-2010 07:01 PM
RAW Files Charles1 Pentax DSLR Discussion 3 03-28-2009 08:20 PM
Does the Photoshop RAW converter work with Pentax RAW Files? mconder Pentax DSLR Discussion 3 05-15-2008 12:14 PM



All times are GMT -7. The time now is 10:17 AM. | See also: NikonForums.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