View Full Version : 40-150 mk i with ec20

22nd April 2010, 04:34 PM
Does anyone have any experience of this combination, and if so what are results generally like? Thinking also of focusing speed etc..

From the few shots I've taken with the 40-150 I bought recently (on ebay - afraid the two on here came too late!) it seems a good little lens and I'm just wondering whether if it were coupled with an ec20 this could be a reasonable alternative to carrying the 70-300 around.


22nd April 2010, 06:10 PM
whilst reasonable seems a simple concept it's an impossible question to answer in reality.

personally I don't think an 80-300 f7-9 (?) could possibly be considered a reasonable alternative to a 70-300 f4-5.6 even before the magnification of the lens weaknesses outwith speed or the camera bodies AF performance are taken into account!

that said with good light and a good AF subject the combination should 'work' fine - it's just that I never find that combination when I need it...

22nd April 2010, 09:06 PM
I would be concerned that the 2 stop loss of speed might be a big disadvantage with the kit zoom..

However what I can report is that the 40-150 with the EC-14 is a very worthy combination. I feel you could use it wide open without too much regret, and that gives you 212mm at the long end if I recall correctly.

In fact the EC-14 is the closest I have come to a vice-free teleconverter. Ask anyone who uses one... well worth the money. I have used it on a 11-22, the 50mm macro, the 40-150 and the 14-54. In each case the results were just plain excellent.


23rd April 2010, 12:52 PM
I happen to have that combination, with a near redundant mk1 that needs a good home...;)

The combination of 2x tc and 40-150mm is not going to work with fast action in a dim arena. At full extension, the max aperture is f9. On a reasonably bright day I tried a shot on a still subject in the shade, and focussing was a lot faster than I expected, but I wouldn't hope for fast focussing on a moving subject.

I did notice some softening of the image with the 2x tc - I thought that using the tc might have altered the close-focus distance, or possibly some movement, but this was consistent over a few shots.

I reproduce some ooc jpgs here, handheld, just resized for the web.

For a proper test, I would have used a triposd, and set the f no to be consistent , etc, but they are real life examples of you might achieve.

Without tc, f5.6, 1/400 sec -


With 1.4tc, f5.6, 1/500sec -


and with 2x tc, f7.6, 1/160sec -



23rd April 2010, 06:04 PM
Thanks all for your thoughts and especially Mark for posting the comparative shots, which were particularly helpful.

Before I spend any more 's I think I'll just see how often I actually use either the 40-150 and/or the 70-300 in the next few months.

3rd May 2010, 04:58 PM
One thing to keep in mind about the 70-300, however, is that it is quite soft unless stopped down. I try to never use it below f7.1. If the 40-150 mki (f3.5-4.5, effectively f7.1-9.0 with ec20) is at least as sharp fully open as the 70-300mm at f7.1, then the real loss of speed is not so significant.

I do not own the ec20, but have the 40-150 mki and the 70-300. I LOVE the 40-150. It's tack sharp. The 70-300 is decent for the bargain price, but the quality doesn't seem up to Zuiko standards.

BTW, check out Andrzej Wrotniak's info on the 70-300mm lens here (http://wrotniak.com/photo/43/zd-070-300.html).

3rd May 2010, 08:02 PM
Hi Craig

Welcome to the site.

Sorry though, I have to disagree with you re the 70-300mm... I have used it on its own and with the EC14 at widest apertures, and captured very sharp photos at these settings. I have never had to 'open it up' and I never have experienced the softness you alude to.