Pistol Reflex Sight instead of Oly EE-1 Dot Sight.

[Dave in Wales]

The Oly EE-1 Dot Sight is not available yet here in the UK and when it is it's likely to cost £99.

I have read that Reflex Sights for pistols can be used in place of the EE-1 and they cost a fraction of the price.

Below is a list of available sights on Amazon, It's a minefield.
Which one would be suitable for adaption to fit the flash shoe of E-M1 fitted with a 75-300 lens.
I am capable of doing the adaption myself.

How would one mount it to the camera's hot shoe.

http://www.amazon.co.uk/s/ref=nb_sb_noss_1?url=search-alias=aps&field-keywords=reflex+sight

 

[Snapsh0t]

There are probably only half-a-dozen different sights in that list but a lot of re-branding.
The important thing is that there are only two different mounts. Most of them have a weaver mount (standard for firearms) but some will have 3/8" dovetail (commonest for airguns). You'll need to make an adapter from a length of weaver rail (available from deben.com) bolted to a flash foot. Not impossible, just messy.