Splitscreen for 1000D arrived-with no instructions

I received a cheap splitscreen for 1000D with two finger-condoms and two tools. But no instructions how to replace the existing screen. What will happen with the four focussing points(in a row)?

will the red lights still flash?

I oculd imagine that using this split-aid is only suitable with the help of a rightangle-loupe 3.5x.

3dreal wrote:

I received a cheap splitscreen for 1000D with two finger-condoms and two tools. But no instructions how to replace the existing screen. What will happen with the four focussing points(in a row)?

will the red lights still flash?

I oculd imagine that using this split-aid is only suitable with the help of a rightangle-loupe 3.5x.

or try this: http://www.katzeyeoptics.com/item--Canon-1000D-Focusing-Screen--prod_1000D.html specifically http://www.katzeyeoptics.com/files/install7.pdf

Ask the seller about the focusing lights. They either don't work at all or everything works except the center point (best case scenario) I'd actually advise getting it installed at a Camera service center in your area. Sometimes if you bring in the focus screen itself, they might even do this complimentary or for a very small fee. Anyway, they've got much better installation tools.

Make sure to test the screen with a slow lens like the kit lens at 55mm f/5.6 for example. It might not be worth it over the original.

3dreal wrote:

nyer82 wrote:

... Make sure to test the screen with a slow lens like the kit lens at 55mm f/5.6 for example. It might not be worth it over the original.

dont understand. It might not be worth it over the original.

Split prism focus aid works best with large aperture lenses.  With smaller maximum apertures of f/4 to f/5.6 the split prism tends to go dark and may not be usable.

2. regaring the focussing lights. ... if the lights are not illumination only sound and green-dot is a reference and i still dont know where it is focussing.

You can still manually select the active focus sensor instead of leaving the camera set to auto selection.

i cannot imagine that with this little split-screen-center-area(compared to SLR) i can properly focus without a right-angle-3.5x viewfinder.

?  Not sure why you want to bother with a right angle viewer instead of using the 1000D's Live View and 5x/10x magnification for focusing.

Sorry I didn't explain "might not be worth it". Lemming explained it pretty well. Regarding the focus confirm lights.. I think the focusing screen actually needs special etching in order to catch whatever contraption is emitting the red lights. Without the etchings... they don't show.

Whatever you want to do.. make sure to save the original screen and keep it in good condition if the split-prism FS doesn't work out for you. Since f/5.6 is really the smallest max aperture we're usually going to see through the viewfinder with our cameras, (I guess we could count DOP button, but usually we don't focus with that). please make sure to test the viewfinder with this. Just twist the kit lens to 55mm and look through the viewfinder.

Ok on your manual lenses, are any very slow... like f/5.6?