Eos to OM-D adapter with Aperture.

[Julian de'Courcy]

I have recently received the Eos to OM-D adapter. This particular adapter comes with a built in aperture. I had seen these advertised online and are to be used with exiting lenses that do not have an aperture ring. I had been dubious about these , but felt I needed to try one and if it worked I could take more advantage of existing modern lenses. I found that it does create a lot of vignetting fairly early when the aperture is closed down. This is mentioned before you purchase the item so it did not come as a surprise. Quite what aperture you are getting is guess work, there is a numbered dial but quite how the numbers relate to aperture size seems on first experiments to vary depending on the lens used. Or at least the vignetting does. The vignetting seems to be far greater on my 400mm canon lens than the 50mm. I do not know for sure but another guess is that this could be that the 400mm has a much larger distance from rear lens to sensor than does the 50mm lens. Someone may be able to verify this. At least the depth of field does alter when the aperture is closed and this can be seen quite clearly in live view.

P8300005 by JuliandeCourcy, on Flickr

A quick portrait shot with the plastic canon 50mm f1.8. with adapter.


P8290011 by JuliandeCourcy, on Flickr

The picture below is un-cropped from the Canon 400mmf5.6 on the OM-D. The close building is 2.8miles and the far hill is close to 7 miles for anyone interested in how much a telephoto lens foreshortens the landscape.

OM-D EM-5 Canon 400mm f5.6 Distance 2.8miles to first building by JuliandeCourcy, on Flickr

 

[Hamish Gill]

Ive not seen anything like that before ... what a strange thing!
Interesting hearing your thoughts!

Do you have a link to where you got it from?

 

[Julian de'Courcy]

Yes Hamish. The company trade as 'asmarteam' on eBay. I cannot of course formally endorse the company or their products other than to say I have purchased several adapters from them, probably six or seven to date ranging from just over £10 to £36. Each of these products seem well made and I am confident to use the adapters on what are at times expensive lenses. The reason I started to purchase from them was that they are based in the UK and the product usually has a free Royal mail post option that usually arrives in four to five days. I could purchase at a cheaper price but for those reasons mentioned I choose them and as said their products seem well made. This is the most I have paid for an adapter most of them are approx half this price.
Canon EOS EF Lens to Olympus EPL1 EPL2 EP2 EP3 EP1 lens adapter | eBay