Thanks guy's, I was looking at the KENKO TelePlus MC4 AF 1.4X DGX
I am thinking of getting the Canon 70-200mm f2.8 lens which on my cropped body APS-C camera would be 112x320mm, with an 1.4 extender added that would become equivalent 157-448mm which would be great for shooting sports. Are there any significant downfalls with that setup that you can think of? I want as much feedback before I decided to invest in the lens and extender.
Your views on Teleconverters please.....?
This is particularly important regarding "functional" AF points with your camera body. Many lower spec bodies will be heavily restricted at f/5.6 (some are down to the center AF point only).always check with the manufacturers compatibility chart, (easily found on the web), before you buy and with the web if you buy a non-Canon TC …… especially for the AF function
I have used the Nikon 1.4, 1.7 and 2.0 (new V3) with 70-200, 300 and 400 with good effect, the latest 2.0 does very well IMO and I have had useable images that would otherwise have been impossible
300 f2.8 Bill
Which version of the 70-200mm f2.8 as the MKI IS version wasn't great with the 1.4x TC and won't even consider the 2x TC. The MKII version much better, especially combined with the MKIII TCs.
I was considering in the long run getting the Canon EF 70-200mm f2.8 L USM lens MK I with the Canon EF 1.4 MK III extender. The Canon EF 70-200mm f2.8 L IS MK II is significantly more expensive than the MK I, is it really worth spending more for MK II considering that I am planning on also getting the 1.4x MKIII extender?
REALLY depends on the camera. The newer high end Nikons have 11 AF points at f/8 and all of them at f/5.6.think f4 /4.5 is the cuttoff of good performance on lenses, atleast AF wise
I only have one lens that ends up f/8 w/ a TC. It works well, but it has fewer (11) points to work with.how well do they work at f8 ? im not sure what the newer sony's conk out at, think its about 6.3 on my a77
I think the D7xxx are down to just the central AF point at/above f/5.6...but although AF works with my D7100, AF accuracy could be better
It's not the teleconverter that makes the image, it's the lens. A 1.4x TC on a 300mm f/2.8 will have barely any impact. The same TC on a 70-300 consumer zoom will degrade the image massively.Elsewhere on the Interweb there are some very good results shown using the Kenko 1.4...
Be careful what you read on the internet and what you infer from it.From what I have read on other forums is that f5.6 is the cut off, I have seen images that would certainly proove this.....
i bought this recentlyThanks guy's, I was looking at the KENKO TelePlus MC4 AF 1.4X DGX