Optical zoom is way better than digital zoom as digital only expands the picture. Optical zoom actually zooms in.
It all depend on your personal need. Either would be best depending on what you use it for.
You can either use the digital image finder to line up your shot on your camera or the optical viewfinder eyepiece that is made of glass, mirrors and lenses.
you will need either a spectrometer or a digital camera most digital cameras will easily pick up infrared wavelengths emitted by lasers but, only if the digital camera is pointed directly in the path of the laser beam. The digital camera can be off the laser beams center a little but not by much. The laser beam will or should show up as a bright white shinny dot in the camera display. The more low end the digital camera the better (Camera phones are perfect for this sort of thing) newer digital cameras have ir filters that block a lot of infrared wavelengths.
You can use either the SD card in the digital camera, or if you camera came with one, use a cord. Just insert either into your laptop and it should come up with a window.
Vivitar sell a digital SLR camera that is a 35mm model which can be purchased at Urban Outfitters and is touted as a great camera for either beginners or professionals.
An IXUS digital camera can be purchased from numerous retailers online and in stores. They can be purchased from Best Buy, Target, Amazon and from eBay either used or new.
One can buy a 5 megapixel digital camera from the Walmart store. Walmart has a variety of cameras that can be purchased either in their retails stores or from their website.
Depending on your computer, you can either use a USB cord, which comes with most digital cameras, or your memory card.
If you're connecting out of the device to the TV's optical in, then from the TV's optical out to the receiver, you're wasting an optical cable. Just connect directly to the receiver. There shouldn't be any sound quality difference either way since it's a digital connection, but it's much cleaner with only one cable.
This part is called a Lens, on the camera and the glasses the are made of either optical glass or optical plastic, in the eye the lens in an organic material. Lens allow light to enter the camera, eye or glasses, and focuses that light on a surface such as the camera's film, the eye's retina, and the glasses wearer's eyes.
The DC20 is a digital camera from Kodak that is pretty much obsolete and no longer for sale. User Ratings on this camera were not good either. Kodak has since not produced anymore for sale.
To take photographcs in either digital format or onto a film. Also some cameras can take video in either digital form or on film. Other functions would just be your main settings for the camera, flash, red eye, corrections of impurities etc.