PDA

View Full Version : EC 20-2x


47johnnyj
8th June 2012, 11:33 AM
Hi there, is there an EC20-2x for hire and what effect does it have on a lens, regards John

IainMacD
8th June 2012, 01:30 PM
Hi John
There is an EC-20 for hire, I used it back at the beginning of May (superb service by the way) with my 50-200 SWD. It does give impressive reach, but I struggled to get any sharp images with it. Having said that I was using it for BIF (Red Kites) and I'm sure that a less agile subject matter, less wind, better lighting and more skilled user could have given much better results.
I have the EC-14 which I like using with the 50-200 and while I had the EC-20 I experimented by putting them both on the lens! The camera wasn't too keen but I could manually focus and take shots of a Kite in a tree using the tripod; the trouble was the wind - everything was oscillating :D
You don't say what you want to use it for, but I recommend hiring it to have a play and take advantage of the excellent service provided here.

47johnnyj
8th June 2012, 02:28 PM
Hi Ian, does this attachment effectively double the range of the 50-200, which I'm going to use, or is that being to optomistic, regards

bilbo
8th June 2012, 04:02 PM
Hi Ian, does this attachment effectively double the range of the 50-200, which I'm going to use, or is that being to optomistic, regardsThat's exactly what it does at the cost of a two f-stop loss. That means that it won't be the fastest lens in poor light conditions.

benvendetta
8th June 2012, 07:10 PM
Hire one of the f2 long lenses to see the ec20 in its best light. I have never been really happy using mine with my 50-200.

FlemmingS
14th June 2012, 09:02 AM
I have been slightly disappointed with my EC20 mainly becasue of the loss of two F-stops., the E30 plus EC14 and 50-200 mm is probably a better combinationthan E30 +EC20 and 50-200 mm combo.
Having said that I think it is quite useful, being reasonably sharp in the center at F:7,1 , auto-focus works great and also it is a reasonably small addition in bulk and weight.

Some examples (all handheld) :

Lion at the Zoo on a cloudy day, distance approx 20 meters 100 % crop.
http://i296.photobucket.com/albums/mm200/fsorensen/Zoo/_C266182ropped.jpg
EXCIF : F:7.1 1/200S Focal lenght 294 ISO 800 NR off IS1

Owl chick in the shadows, distance approx 12 meters heavily cropped:
http://i296.photobucket.com/albums/mm200/fsorensen/Fugle/01Small.jpg

F:7.1 1/160 S Focal Length 400 mm ISO 800 NR off IS1 EV + 0,3

Both looks great on A4 print (with a relatively cheap HP6510 Ink-jet)

By accident I tried the 35-100 mm F2:0and EC20 combo and that was great, slightly better than the 50-200 mm F:2.8

I personally believe that the EC20 deserves HG and SHG glasses and an E-5 camera for best results.

Ian
20th June 2012, 05:52 PM
Hi Ian, does this attachment effectively double the range of the 50-200, which I'm going to use, or is that being to optomistic, regards

The EC-20 does double the focal lengths from 50-200 to 100-400, but at the cost of two stops of light, so maximum aperture is reduced to f/5.6-f/7. The EC-20 does lose a little more sharpness than the 1.4x EC-14, but it's not unusable with the 50-200. It does shine, especially, with the 150mm f/2, 35-100 f/2 and the 90-250 and 300mm biggies (both f/2.8). The EC-14 turns a 50-200 into a 70-280 f/4-f/5.

Ian

CallaWolf
23rd June 2012, 08:04 PM
http://e-group.uk.net/forum/showthread.php?goto=newpost&t=21174
In case you should want to buy one

Greytop
23rd June 2012, 09:28 PM
If birding is your thing in reasonable light the EC-20 and 50-200 work very well I my experience..

All almost wide open (f/7.1) @ 400mm with the E-5

http://e-group.uk.net/gallery/data/500/p3243419_10242.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/31767)

http://e-group.uk.net/gallery/data/500/P7156610_1024.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/36868)

http://e-group.uk.net/gallery/data/500/p6065656_800.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/35780)

Edit, here's one in not so good light, hand held with the E-M5

http://e-group.uk.net/gallery/data/500/P5270177.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/47243)

FlemmingS
27th June 2012, 10:14 AM
Magnificent moon shot ! *chr

Well done

Cathrine Stephansen
12th July 2012, 11:15 PM
Amazing, all of them! I could never get that kind of quality with the EC20, maybe if I stop down more itr would be sharper?

benvendetta
13th July 2012, 08:23 AM
I obviously need the e5 to use with my ec
20 and 50-200 combo!

Greytop
13th July 2012, 08:45 AM
I obviously need the e5 to use with my ec
20 and 50-200 combo!

The last image was with the E-M5 so I think it's more a case of matching characteristics of a particular 50-200 to the EC-20.
There are bound to be variations due to manufacturing tolerances, assembly and set-up, so perhaps some 'pair' better than others :)

benvendetta
13th July 2012, 12:01 PM
Amazing, all of them! I could never get that kind of quality with the EC20, maybe if I stop down more itr would be sharper?

There is a limit to the amount of stopping down you can actually do with this combo. I have determined that f9 is the optimum aperture. Any smaller then your shutter speeds and/or ISO are going to be compromised

Tordan58
13th July 2012, 12:01 PM
I am surprised with the sharpness in the pictures shared by Huw, these have better detail rendering than the results I have obtained with my 50-200 SWD + EC20. Did you use MF, Huw?

Regarding Cathrine's comment: F7.1 on this combo should be wide open if I got the maths right.

Cathrine Stephansen
13th July 2012, 12:19 PM
Regarding Cathrine's comment: F7.1 on this combo should be wide open if I got the maths right.

Yes, without checking I think you're right. But I've never had such sharpness using the EC20. I think Greytop may be right, that there are pairs that work well and others that don't. Which isn't too convincing of the quality assurance system, though.

Ian
13th July 2012, 12:28 PM
There is a limit to the amount of stopping down you can actually do with this combo. I have determined that f9 is the optimum aperture. Any smaller then your shutter speeds and/or ISO are going to be compromised

You will also start to see diffraction softening at f/9, although slight.

Ian

Greytop
13th July 2012, 12:29 PM
I am surprised with the sharpness in the pictures shared by Huw, these have better detail rendering than the results I have obtained with my 50-200 SWD + EC20. Did you use MF, Huw?

Regarding Cathrine's comment: F7.1 on this combo should be wide open if I got the maths right.

Hello Tord, all images were autofocus with the E-5, the Moon image was manual focus with the E-M5.
Wide open at 400mm is f/7

Tordan58
13th July 2012, 01:24 PM
Hi Huw,

Thanks for info regarding focus method. It could be that the E5 is superior in AF performance compared to the E620 that I am using. It could also be that the 50-200 + EC20 that I use are poorly matched to each other (toleranses?). And lastly I know there is nothing wrong with my EC20 per se since I have achieved good results with two lenses that call for MF: OM 50mm F/1.4 and Skywatcher 600mm F/7.5 scope. I have yet to try the 50mm F/2, currently out on loan.

/Tord

PS Regarding my comment on wide open - what I meant is that F/7.1 (looking at the picture EXIF) was wide open. I should have written "very close to" since the theoretical value should be 7.0. My 50-200 @200, F/3.5 + EC20 displays a value of F/7.1 in the viewfinder/EXIF. Never mind...

Greytop
13th July 2012, 02:20 PM
No worries Tord *chr

David M
13th July 2012, 11:17 PM
I've found sample variation in the OM system TC's. I have 2 OM 2x-A and after a while noticed one was better than the other. However I don't know which is currently in my Pelican and which is in the storage cabinet. I also have 2 OM 1.4x-A TC's but have never compared them.