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The 800mm f/5.6L IS is Canon’s longest telephoto lens. It’s every bit as sharp as the other Canon supertelephoto lenses, and the IS provides a full 4 stops of image stabilization. This can be important in a lens this long even when mounted on a tripod, due to vibration from things as minor as mirror slap.
Although it is fully compatible with the 1.4x teleconverter, it will only autofocus on 1D series cameras with an extender mounted. Autofocus is not guaranteed, even on 1D bodies with the 2x teleconverter; however, some report that center point autofocus may work, at least in bright light.

President of LensRentals.com
Now that I’ve taken this out a couple of times, I’ll answer the question everyone asks: “why should I use the more expensive 800 f/5.6 instead of a 600 f/4 IS with a 1.4x converter?”
Now that I’ve shot with the 800mm, I like it. I definitely prefer it over a 600mm with teleconverter if I know I need the focal length. The 800mm f/5.6 is also the photography equivalent of a D cup- not a necessity, but wherever you go with it, you’ll make lots of new friends.
Addendum: Now the question has become “why should I shoot the 800 f/5.6 instead of the lighter 600 f/4 IS II with a 1.4x teleconverter”. I don’t know. There’s something you never read on the internet: I don’t know.
April, 2013
LensRentals.com offers rentals ranging in length from 1 to 90 days. The shopping cart will automatically update the quoted price as you adjust the length of your rental. Our most common rental periods are shown below:
| Rental Period | Waiver Price | Rental Price | Total Price | Approximate Day Rate |
|---|---|---|---|---|
| 3 days | $52.00 | $345.00 | $397.00 | $132.33 |
| 4 days | $56.00 | $370.00 | $426.00 | $106.50 |
| 7 days | $74.00 | $493.00 | $567.00 | $81.00 |
| 10 days | $100.00 | $666.00 | $766.00 | $76.60 |
| 14 days | $130.00 | $863.00 | $993.00 | $70.93 |
| 21 days | $174.00 | $1159.00 | $1333.00 | $63.48 |
| 30 days | $218.00 | $1454.00 | $1672.00 | $55.73 |
| 45 days | $285.00 | $1898.00 | $2183.00 | $48.51 |
| 60 days | $333.00 | $2219.00 | $2552.00 | $42.53 |
| 90 days | $429.00 | $2859.00 | $3288.00 | $36.53 |
| Rental Period | Rental Price | Approximate Day Rate |
|---|---|---|
| 3 days | $345.00 | $115.00 |
| 4 days | $370.00 | $92.50 |
| 7 days | $493.00 | $70.43 |
| 10 days | $666.00 | $66.60 |
| 14 days | $863.00 | $61.64 |
| 21 days | $1159.00 | $55.19 |
| 30 days | $1454.00 | $48.47 |
| 45 days | $1898.00 | $42.18 |
| 60 days | $2219.00 | $36.98 |
| 90 days | $2859.00 | $31.77 |
LensRentals.com ships via the appropriate FedEx service necessary to have your rental arrive on the date selected. Return shipping is included in the shipping price, and we include a prepaid return label with your order - all you need to do is bring it to a FedEx drop-off location when your rental is complete. If you prefer UPS shipping, you can select it during the checkout process for about 10% more.
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The shopping cart can automatically quote shipping, even for multi-item and oversize orders. Shipping multiple items together offers a significant savings over shipping them individually.