Originally posted by dadipentak Interesting--I'll do some experimenting.
FWIW: This was my theory for the K5 as that body doesn`t support TC`s but last weekend I forgot to turn SR off on my K-3 and again most shots were blurred. Exif says 300mm instead of 420 so again the SR is working to compensate for a faulty focal length.
Originally posted by wissink Testing is a problem here. No stores in town and the stores that are 50 km away don't carry much other than the budget Pentax gear. Sad I know.
TenZ.NL thanks for sharing the photos and link. I remember seeing those on the review page. Its helpful. Do you find it worth using the TC? Or is cropping the image provide just as much detail in your opinion?
Thanks
First of all, the bare lens has allways better IQ 1 on 1 but 420mm vs 300mm is a significant gain in reach and has often been the difference between the front and the back of the animal or bird
The thing is, when 420mm is too long, you still can zoom out with this combo. Putting on the TC when you`re suddenly in need of extra reach mostly leaves you with nothing.
One thing though, AF lockingspeed is slower and the combo will hunt more with the TC on. I guess working with a TC is allways a compromise.
And for that reason I`m still debating whether to get the new DFA150-450 or the sigma 300 F2.8