Split focussing screen.

[mikenco]

Has any one fitted one of these?

http://cgi.ebay.co.uk/Dual-Split-Image-Focus-Screen-4-Olympus-E520-E510-E-420-/350270207360?pt=Digital_Camera_Accessories&hash=item518dbb3580#ht_1834wt_1139

Is it a cheap Chinese copy of something better? Are they worth bothering with?

Thanks

Mike

[Hostamill]

I have fitted a similar screen om a Canon Eos 450D.
I works brilliantly with large apertures, but from f 8 and smaller it can be fiddly to use because the screen gets to dark.
There are workarounds (focus using large aperture, then set small aperture), but I would not advice them on a camera for everyday use.

[mikenco]

Ah, thanks. That does confirm what I was thinking. 'Anything' in the path of the light must block something.

Thanks

Mike

[calvin83]

The tradition matte of the screen on your link should be dimmer when compared to your original focsuing screem. You can find more information on inexpesive focusing screen at http://www.focusingscreen.com/privacy.php .

[Hostamill]

I forgot to mention the problem only occurs when using a mf lens + adapter. AF-lenses leaves the large aperture until you take the picture.
No af-lights lighting up, but an in focus beep when sharp.