Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-30-2007, 11:12 AM   #1
New Member




Join Date: Dec 2007
Location: Rome
Posts: 13
18-250 and closeup

I have decided that with my approaching k10d my first lens will be the 18-250 ( tamron or pentax, whichever will be cheaper ).

I was reading it has 1:3 ( more or less ) magnification at 250mm, so I'm thinking of adding a good close up lens ( like canon 500d or the nikon equivalent ).

Anyone knows which kind of magnification I can achieve with such a combination? Macro for me is a very rare thing, but I would not mind to be prepared for that flower or insect met on a trip.

Thanks,

Giovanni

12-30-2007, 03:38 PM   #2
Senior Member




Join Date: Nov 2007
Location: Moscow, Russia
Posts: 239
You cannot achive real high quality 1:1 macro with 18-250. For this you have to get a macro lens... That's not cheap, but the results are stunning, comparing to any non-macro lens.
12-30-2007, 03:49 PM   #3
Inactive Account




Join Date: Jul 2007
Location: London
Posts: 1,067
Hi Giovanni

I have never used a dedicated close-up lens myself, but here is an example of a 'macro' photograph I took using the extreme 250mm end of my Tamron 18-250mm Di II superzoom, so hope this helps:

https://www.pentaxforums.com/forums/136007-post15.html

You might also like to investigate the reasonably inexpensive Raynox DCR-250 clip-on close-up adapter via the link below:

Raynox | DCR-250, 2.5x Super Macro Lens | DCR250 | B&H Photo

Finally, here's a photo taken by a forum member with the Raynox close-up adapter:

https://www.pentaxforums.com/forums/76235-post10.html

Best regards
Richard

Last edited by Confused; 12-30-2007 at 04:39 PM.
12-30-2007, 04:57 PM   #4
New Member




Join Date: Dec 2007
Location: Rome
Posts: 13
Original Poster
that shot with the raynox shows that a similar combination is more than enough for me.

I just wonder, since the raynox is 49mm, with the adapter probably i would have vignetting, sinche the 18-250 is 62mm.

So probably is better to take the correspondant nikon or canon close up, of the right diameter.

12-30-2007, 11:43 PM   #5
Senior Member
matix's Avatar

Join Date: Jan 2007
Location: Brisbane, Australia
Posts: 239
18-250 works well as a macro, or tele.

QuoteOriginally posted by Landaris Quote
I have decided that with my approaching k10d my first lens will be the 18-250 ( tamron or pentax, whichever will be cheaper ).

I was reading it has 1:3 ( more or less ) magnification at 250mm, so I'm thinking of adding a good close up lens ( like canon 500d or the nikon equivilent ).

Anyone knows which kind of magnification I can achieve with such a combination? Macro for me is a very rare thing, but I would not mind to be prepared for that flower or insect met on a trip.

Thanks,

Giovanni
Hi Giovanni, I have shot many 'Macros' or Cropped images with the Tamron 18-250, this one was shot two days ago. While this is not a perfect pixel peeping macro, I find the Tamron aquits itself well when needed, as long as you have a flash or good lighting. 1/180s, F11 and 100 ISO



To give a comparison, this next shot was also at 250mm and cropped, shot is shadow at ISO 800, 1/125sec and f9.5. This speaks well for the Tamron as well, it was a tough shot as the birds refused to land on the bush which was in sunlight .

I think the SR would have helped on this one too.



Phil
12-31-2007, 05:52 AM   #6
Veteran Member
Mechan1k's Avatar

Join Date: Jun 2007
Location: Sydney, Australia
Posts: 2,883
Nice shot of the Galahs ... I found the same .. the buggers don't stay still ... neither do cockatoos.

I had all sort of issues with my Pentax FAJ75-300 handheld at a decent distance ... you have done well with that cropped shot there Phil.
12-31-2007, 11:14 AM   #7
Pentaxian
jgredline's Avatar

Join Date: Oct 2007
Location: LosAngeles, Ca.
Photos: Albums
Posts: 10,540
QuoteOriginally posted by matix Quote
Hi Giovanni, I have shot many 'Macros' or Cropped images with the Tamron 18-250, this one was shot two days ago. While this is not a perfect pixel peeping macro, I find the Tamron aquits itself well when needed, as long as you have a flash or good lighting. 1/180s, F11 and 100 ISO



To give a comparison, this next shot was also at 250mm and cropped, shot is shadow at ISO 800, 1/125sec and f9.5. This speaks well for the Tamron as well, it was a tough shot as the birds refused to land on the bush which was in sunlight .

I think the SR would have helped on this one too.



Phil
Very nice indeed!
I have this lens, but have not considered doing close up macro with it. I will have to reconsider.
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!
k-mount, lens, magnification, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sigma 18-250 or Pentax/Tamron 18-250? mjbens01 Pentax SLR Lens Discussion 3 07-08-2010 09:10 PM
Macro Extreme macro closeup yeatzee Post Your Photos! 9 01-10-2010 07:05 PM
Why DA18-250 is double the price of Tamron 18-250? raider Pentax SLR Lens Discussion 6 12-13-2008 05:40 AM
Help with closeup lens filters ctt Pentax SLR Lens Discussion 3 09-01-2008 05:39 PM
4 macro's and closeup flowers little laker Post Your Photos! 7 04-30-2008 03:08 PM



All times are GMT -7. The time now is 11:56 PM. | 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