What is mirror lockup and why would I want it?
wrote in message >> news:118utmotdfbaq8f@corp.supernews.com… >>> Is this the correct forum for such questions? >> >> I’d say yes, since digiscoping can involve any type of digicam for >> which an adapter is available for coupling to the scope. >> >> Bart > >Thanks. > >First of all, I’m trying to figure out what sort of scope quality is >really necessary, as it would appear that 20x is the most workable >magnification. Comments would be appreciated: though not strictly >topical, that’s an important part of the process. > >Second, and topical here, is the question of what sort of digital camera >is optimal. I’m envisioning a setup, with this rig on a tripod >somewhere in the wilds, where any sort of inconvenience and/or >awkwardness can become a factor. A few issues become obvious: > >What is the best way to view the target prior to image acquisition? I >cannot imagine that presetting the rig and then viewing through separate >binoculars would be very workable most of the time. Wildlif
> The extra weight of the dSLR should help, but the mirror should hurt. For some reason I’d assumed the mirror action wouldn’t really have much effect on the photograph. Once you guys had told me what mirror lockup was (see threads passim) I kind of thought “deal with that if I ever see it.” Are you telling me it should be a consideration for most shots? I’d already figured more frequent use of a tripod is in order, so perhaps I’d better get used to this mirror lockup feature! > Here’s how to test it. Pick an (equivalent) focal length, e.g. 100mm. Set > your P&S camera lens to that length and take 20 shots at 1/25, 20 at 1/50, > and 20 at 1/100. Repeat for the dSLR. Compare every shot to a standard > shot taken on a sturdy tripod for sharpness and determine what percentage > are sharp at each shutter speed. OK, thanks. That’s tomorrow’s project. 🙂 — The email address used to post is a spam pit. Contact me at http://www.derekfountain.
