How long is 800mm in inches ? - Optics

25.4 mm to the inch
divide 800 by 25.4 and you get 31.496 "

About 31.50in x 74.80in x 51.18in.

Pi*radius squared*length=volume

3.14 * (.8*/8) * 5 =10.05 m³
1 m³ = 35.3147 ft³
10.05³ = m³ = 354.91

Volume = L x B x H =800 X600 X320= 153600000 cubic mm =153600 cubic C,s =153.6 LTRS

The lens lacks the electronics to communicate with the camera. You must shoot in manual mode (turn the mode dial to M). You'll have to set the aperture and shutter speed without any assistance from the camera's light meter. You can review the photo and use the histogram to adjust the exposure.

31.5 inches and 11.0236 inches

Yes. Of course, the lens isn't an autofocus lens so you'll have to focus manually. Also, the lens does not have the electronics to communicate with the camera, so you'll have to shoot in the manual exposure mode without any assistance from the camera's exposure meter. You can review photos and use the histogram to fine-tune the exposure.

You're probably going to want to use a tripod to hold the camera steady. The lens is long enough, magnifying even the slightest camera movement, and heavy enough that it's almost impossible to hand hold.

That lens does not contain any electronics, so it will not communicate with the camera. You'll have to shoot in Manual mode, without any assistance from the camera's exposure meter. Also, as it's a mirror lens, it does not have an adjustable aperture. Your only means of controlling exposure are with ISO and shutter speed.

http://cgi.ebay.de/Tasco-Teleskop-Refraktor-302049,-Brennweite-800mm_W0QQitemZ150392404424QQcmdZViewItemQQimsxZ20091127?IMSfp=TL091127192003r13898

See this page.

Aperture- 60 mm

Focal Length- 800mm

This is a very small aperture similar to a pair of 10x50mm binoculars.

This is a cheap department store telescope --- please don't get it.

You WILL be disappointed.