I double that. Excellent! > Subject: [AZ-Observing] Re: Images of International Space Station Moon Transit > From: pjhmx1@xxxxxxxxx > Date: Fri, 18 Oct 2013 05:53:56 -0700 > To: az-observing@xxxxxxxxxxxxx > > Amazing! > > Sent from my iPhone > > > On Oct 18, 2013, at 1:36 AM, Tom Polakis <tpolakis@xxxxxxx> wrote: > > > > Jenn and I set up the equipment at the north end of Meridian Rd., in a > > parking lot for a trailhead that goes into the Usery Mountains. > > > > Here are some images of last night's ISS transit of the moon taken with > > Canon 50D camera mounted to a TeleVue 101 refractor. A 2x Barlow brought > > the focal length to roughly 1100 mm at f/11. Since the shutter speed has to > > be at least as fast as 1/2000 sec, the ISO needed to be 800 to make the > > image acceptably bright. > > > > Since the sensor in the 50D is rather large, the frame rate at its fastest > > is only 6 frames per second. This image is a composite of the four frames > > that captured the ISS during its 0.6-second transit. The image is scaled > > down to fit the moon on an average computer display. > > > > http://www.pbase.com/polakis/image/152939476/original > > > > > > These two images are not scaled, rather they are full-sized crops at the > > native image scale. > > > > http://www.pbase.com/polakis/image/152939477/original > > http://www.pbase.com/polakis/image/152939480/original > > > > > > Next to the TV101 was the 10" f/5.5 recording a very tiny portion of the > > moon at prime focus with the webcam at 60 frames per second. While CalSky > > predicted the ISS to pass right over the crater Tycho, in fact it missed it > > by several arcminutes, putting it outside the frame of the chip. > > > > Tom > > -- > > See message header for info on list archives or unsubscribing, and please > > send personal replies to the author, not the list. > > > -- > See message header for info on list archives or unsubscribing, and please > send personal replies to the author, not the list. > -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.