Canon 93517, 93518, 93515 manual Deluxe Tele-Extender #93643, Piggyback Mounts, 16mm Adapter #93636

35mm

SLR

T-RingTele-Extender Eyepiece Visual Back

#93603

Deluxe Tele-Extender – #93643

The Deluxe Tele-Extender for Schmidt-Cassegrain telescopes is a hollow tube that allows you to attach a camera to your telescope, with an eyepiece installed. By using the Deluxe Tele- Extender in combination with an eyepiece, you can increase your instrument’s effective focal length to well over 10,000mm! And this corresponds with a matching increase in image size. This technique is known as eyepiece projection photography. The following formula can be used to determine approximate effective focal length:

EFL = Telescope focal length/Eyepiece focal length x DF (the distance from the center of the eyepiece to the film).

The Deluxe Tele-Extender is used for high-power lunar, solar and planetary photography as well as for extreme terrestrial photography. It fits over the telescope’s eyepiece (even large eyepieces such as those in Celestron’s Ultima line), and connects to the visual back of the telescope. Optional counterweights will be necessary to properly balance the telescope when using the Tele-

Extender.

To use the Deluxe Tele-Extender, remove the diagonal from your telescope and insert an eyepiece directly into the visual back. Place the Tele-Extender over both the eyepiece and the visual back, then attach your 35mm SLR camera to the back of the Tele- Extender, using a T-Ring. The Tele-Extender’s built-in safety device will help

prevent your eyepiece from becoming accidentally dislodged.

There are a few things to keep in mind when using this accessory. First, the image you’ll see through your camera’s viewfinder will be upside-down. Secondly, due to the extremely high magnifying effect afforded by

this accessory, extra care to prevent camera and telescope vibration, accurate polar alignment and use under good seeing conditions will all assist you in capturing high quality images.

Piggyback Mounts

Celestron’s Piggyback Mounts are a great accessory for all observers interested in deep-sky astrophotography, particularly beginners. These mounts allow you to attach your camera, with its lens, to either the top or side of the telescope, making it possible to shoot with a normal or wide angle lens while guiding through the telescope.

One model fits the C8, C91/4", C11 and C14 telescopes and mounts to the rear cell of the telescope. The C5 model includes a weight set and mounting hardware to attach the camera to the telescope’s piggyback platform.

Piggyback Counterpoise – 5" [93603] Piggyback Mount – 8", 91/4", 11", 14" [93598]

T-C 16mm Adapter – #93636

This valuable adapter converts video cameras, (or 16mm film cameras) with removable lenses from the standard “C-mount” thread, to the larger T-thread used in still cameras. Thus, any of these cameras can be converted for use with a telescope.

To adapt a C-mount camera for use with a Celestron instrument, first thread the T-C Adapter onto the camera, next thread a T-Adapter onto the T-C Adapter, and last, thread this assembly onto the rear cell of your Celestron instrument.

#93598

Please note that some film and video cameras use standard still camera lenses, and therefore use a normal T-Adapter and T-Ring. Check your camera’s instruction manual for more detailed information.

26