Focusing under low light conditions

[zelonisv_bob]

Hey, I finally found out where to post a question or comment!

Attempting to use the Manual mode of shooting in Live View, I seem to need to temporarily adjust either the ISO setting to a very high number or the Shutter speed to a very slow setting in order to get a bright enough image on the LCD screen for the purpose of focusing.  When doing astro-photography when celestial objects are virtually motionless, that's not a problem, but when photographing subjects such as fidgety birds during daylight hours, that necessity becomes a bother and a hindrance, and so I often lose the chance to "snap" a quick shot. Is there a work-around for this? Thanks.

 

Bob Z. 

[s3igell]

You are asking about using BYEOS for Daytime Wildlife Imaging ??

What equipment are you using ??  Scope / Lens ??

[zelonisv_bob]

You are asking about using BYEOS for Daytime Wildlife Imaging ??

What equipment are you using ??  Scope / Lens ??

 

No, I'm not using BYEOS for ordinary Daytime Wildlife Imaging. I'm using my T1i camera with a non-Canon brand mirror-type telephoto lens, fixed f/8, 70mm, 500mm. focal length. The reason I posted this question to this forum is because I'm not getting an answer to it from the Canon DSLR Yahoo Users' Group. But, yes, I do use BYEOS for astrophotography. My astro equipment is an Explore Scientific ED127 carbon-tube refractor (f/7.5, 127mm.) and a f/4.5 254mm. Newtonian reflector of my design. I know that my question doesn't fall within the usual scope (ha, ha) of BYEOS discussions; however, somewhere in the archives of the former Yahoo BYEOS users' group's postings, someone did ask how to make the image of a star in the LCD screen bright enough to focus on.

[s3igell]

The setting that you are looking for is "LiveView Exposure Simulation", and has been discussed in this "Dim LiveView" thread.

[zelonisv_bob]

The setting that you are looking for is "LiveView Exposure Simulation", and has been discussed in this "Dim LiveView" thread.

 

Thank you, s3igell. I checked out the remarks by Guylain and will henceforth use his suggestions. Now that I think about my T1i and the mirror-type telephoto lens that has nothing automatic about it, I can understand that what I have is a catadioptric "telescope" and an attached camera just as my regular telescopes with camera body are configured, meaning imaging at prime focus!

 

Bob Z.