Reddit reviews Canon EF 800mm f/5.6L IS USM Super Telephoto Lens for Canon Digital SLR Cameras

I was out once with a 300mm lens photographing the moon and it was nowhere close to good enough for this magnification.

I'd say 500mm minimum, probably much more. aka a hell of an expensive lens.

Something like this could probably do the job.
http://www.amazon.com/Canon-800mm-Telephoto-Digital-Cameras/dp/B00132FXOW

Digiscoping. People thought it was stupid that someone was taking a cellphone shot through binoculars but photographers on a budget do this all the time because telephoto lenses that you see on NFL sidelines can cost as much as a car.

Right, when you're shooting for the rabid fans spending billions of dollars for the games every season, it's not too hard to imagine skilled/connected photographers earning a piece of that pie. Then there are incredibly dedicated nature photographers who will spend a week in a blind and only get a chance that lasts a few seconds to document their subject. They'll want the best equipment humanity has to offer.

It's not the only 10k+ Canon lens

Canon EF 400mm f/2.8L IS II | $11,489.00

Canon EF 500mm f/4L IS II | $10,399.00

Canon EF 600mm f/4L IS II | $12,799.00

Canon EF 800mm f/5.6L IS | $13,249.00

Then you know the answer. Unless the department uses it for some advanced course or special work, it is likely someone is abusing power.

>https://www.amazon.com/Canon-800mm-Telephoto-Digital-Cameras/dp/B00132FXOW

800m lens should be around that price point though

From the picture, it looks like she's using this one. It's $12,999 on amazon. I just bought a car for that price.

Now all you need is this

DAYUM!

http://www.amazon.com/Canon-800mm-Telephoto-Digital-Cameras/dp/B00132FXOW

Sell the kit lenses and buy this: http://www.amazon.com/Canon-800mm-Telephoto-Digital-Cameras/dp/B00132FXOW/ref=sr_1_1?ie=UTF8&qid=1459020738&sr=8-1&keywords=800mm

On a 35mm camera it would be extremely hard to get that kind of reach. If you have a hefty bank account, you could spring for this guy.

That said, when considering focal length, you have to also consider the size of the sensor, or other light sensitive recording material. 50mm is considered a standard focal length on a 35mm camera. That is, 50mm is the equivalent of what your eyes see when it is projecting light on a 35mm slide of film. Modern day Digital SLR cameras are modeled after the 35mm SLR. Of these DSLR cameras, let's consider the Canon 7D, and the Canon 5D. The 5D has what is known as a "full frame" sensor. In other words, the camera's sensor is exactly the same size as a slide of 35mm film. The 7D however, has what is known as a "crop sensor". The 7D's sensor is smaller than the 5D's. So, any lens on the 5D will be exactly what the lens says it is (a 50 is 50, a 28 is 28). On the 7D however, we need to multiply a lenses' focal length by the body's crop factor, or 1.6. This means that any lens on the 7D will actually be 1.6x longer than it is labeled (50 is now 80, and 28 is now 50). Full frame and a 1.6x crop aren't the only two sensor sizes that exist. I just picked those two for my example because it's an easy calculation, and is rather common.

The point is that the focal length of a lens is only one factor in determining the telephoto capabilities of that lens. The sensors in DSLR cameras are much larger than those in a small camcorder, or in a cellphone. So, a lens doesn't necessarily need to be excessively long in order for it to be able to resolve things at a large distance.

A good lens can be quite expensive, often more than the camera body itself, but my $10k example was based off the Canon EF 800mm, which is basically the Rolls Royce of Canon telephoto lenses. Essentially they are just tubes with glass, but what you're paying for is the R&D that went into making them, the performance and end result they produce because of it.

thanks for your reply..

this might be the dumbest question of the day but I'm just going to ask it...

why is the range for 800 mm lenses between $150-15,000?

What is the difference between these two lenses?? Obviously Im missing something here.

https://www.amazon.com/Opteka-420-1600mm-Telephoto-Digital-Cameras/dp/B00OELIMWO/ref=sr_1_3?s=electronics&ie=UTF8&qid=1539127776&sr=1-3&keywords=800mm+lens

https://www.amazon.com/Canon-800mm-Telephoto-Digital-Cameras/dp/B00132FXOW/ref=sr_1_2?s=electronics&ie=UTF8&qid=1539127776&sr=1-2&keywords=800mm+lens

http://www.amazon.com/Canon-800mm-Telephoto-Digital-Cameras/dp/B00132FXOW/ref=sr_1_1?ie=UTF8&qid=1324448932&sr=8-1 And there's your glass.

http://www.amazon.com/Canon-800mm-Telephoto-Digital-Cameras/dp/B00132FXOW/ref=sr_1_1?ie=UTF8&qid=1370647500&sr=8-1&keywords=canon+ef+800mm+f+5.6l+is+usm