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Re: [OM] Blood moon

Subject: Re: [OM] Blood moon
From: Moose <olymoose@xxxxxxxxx>
Date: Thu, 06 Nov 2014 17:15:34 -0800
On 11/6/2014 4:36 PM, Chuck Norcutt wrote:
Hyperfocal methods shouldn't enter the equation at all. Trying to use hyperfocal methods and failing will almost certainly put infinity out of focus. Hyperfocal is for including much of the nearby foreground along with focus all the way to infinity. Since it's only the moon you're interested in forget the foreground and concentrate on getting infinity correct.

Yup.

Setting up for daylight infinity focus and marking the focus point should work but if you're using a very long lens and small aperture you need to be focusing on a target about 3 km away. Haze could be a problem. If you put a piece of tape between the focusing ring and lens barrel to mark infinity you could slice through the tape (carefully) and leave it there. Then just align the two pieces of tape when you need infinity focus.

Nope.

Or at least not necessarily. As I understood it, the 'focus past infinity' and the infinity mark with a line attached to the bottom of it on some lenses both exist to deal with changes of focus with temperature changes.

Should that be true of Brian's lens, an infinity mark made in warm day will 
likely be inaccurate in cool night.

Is it really that hard to focus on the moon? Live view focus magnification in MF mode and don't touch the focus thereafter; perhaps even tape it in place. The 60D has a similar LCD and LV set-up, and I had no problem getting the moon in focus.

Lunar Moose

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