P-Ext

 
Pentax 67‚ 1.4X and 2XExtenderComparison
2X Bigger‚ But How Good?
I have never been a big fan of 2X extenders. In fact, I have never found one that I could feel would give me the image quality that I needed and wanted. Sure, I use them from time-to-time, but I don't think that I've ever secured an image with a 2X extender that I was really happy with or that was publishable. (If you have been happy with your 2X extenders‚ good).
My main landscape photography system was for years theRollei 6008withSchneiderlenses. I had a 2X extender for them, and as with prior experiences with 2X extenders, rarely got satisfactory results. When I switched to thePentax 67I purchased the1.4Xextender and have been very pleased with it. It has produced some very fine images. But, when a friend offered to lend me hisPentax 2Xextender for testing, I couldn't resist. 
But, this turned out to be a lot more difficult a task than I first imagined.
The Problem with 2X
Some general observations fir...