Test : Teleconverters vs Enlarging in Photoshop

[Eric_Chan]

Dan,

It's great that you find the 2x extender to work very well with the 500. But what Terry's tests suggest is that the results might be even better if you instead used the 1.4 and then upsampled (carefully)!

If that's the case, then it's very valuable information because I personally find it much easier to see through a f/5.6 lens (500 f/4 + 1.4x -> f/5.6) than a f/8 lens.

Eric

[David_Kieltyka]

There's also the issue of framing to consider. It might be worth it to trade off some resolution in exchange for getting the framing you want right in the viewfinder as opposed to cropping & up-resing a wider view. When I got rid of my 2x I also mostly got rid of the reach the 2x gave me. I have on occasion cropped & up-res'd but as a rule I don't do this. I just frame for the wider view. YMMV of course.

-Dave-

[Noel_Carboni]

The implication here is that, for some types of shooting (e.g., birding or wildlife) "you can never get a long enough lens", meaning that the focal length is maxed out and the subject is still too small in the frame. The ways to mitigate this issue are:
[*]Buy a longer lens. This can cost a lot of money.[*]Buy a teleconverter. This can cost a little money and a little quality.[*]Upsample in software. This can cost time and a little money.

One thing I've found myself doing, given too few millimeters, is centering the subject, assuming I can crop later. As I use the center focus point, this usually works out well.

-Noel

[Dan_Barthel]

I think my point is that the longer the telephoto, the better the 2x performs. Check the articles section at http://www.benhorne.com/ for a visual confirmation. As I said previously the 2x on the 300 did not overwhelm me. On the 500 it's just great.

Dan

[NorbertBissinger]

Wanted to make VIEW 1.000 nothing ealse.

[KaraSchaeffer]

[ QUOTE ]
Wanted to make VIEW 1.000 nothing ealse.

[/ QUOTE ]
[img]/ubbthreads/images/graemlins/wink.gif[/img]
Norbert - that's the funniest post I've seen on this site for months!

[Eric_Chan]

[ QUOTE ]
I think my point is that the longer the telephoto, the better the 2x performs. Check the articles section at http://www.benhorne.com/ for a visual confirmation. As I said previously the 2x on the 300 did not overwhelm me. On the 500 it's just great.

Dan

[/ QUOTE ]

Thanks for the link; I just read that article. Interesting ... it seems to be at odds with what Terry found on his 600 f/4. Maybe it's just one of those "YMMV" things ...

Eric