Wisdom about Teleconverters: Now if I could spend lots of $$$ on a new lens I would. However, I cannot, so I am thinking about using a x2 teleconverter to double the length of my Canon...

Chefneil

Now if I could spend lots of $$$ on a new lens I would. However, I cannot, so I am thinking about using a x2 teleconverter to double the length of my Canon 75-300. Has any one tried it? Will it go on a 7D and maybe the 5D classic.

olc

CHG_CANON Loc: the Windy City

Too bad, but it won't work. Neither of Canon's extenders (1.4x and 2.0x) will work with your lens. They cannot even be physically connected to all both a few L zoom lenses. You should use a crop sensor that provides a narrower field of view. With a limited budget, also think 'used' not new and look at older models that are still good to great, just not the newest.

SS319

What are you going to do with your pictures?

Unless you intend to go beyond 16 X 20 Prints, you can crop to match a 2X converter, so effectively, you have the capabilities of a 600 mm lens.

If you are viewing on line, you can easily create a good image with 1/10 of the original size image - so now you are close to a 2400 mm lens equivalent.

And that is without investment in ...things.

TriX Loc: Raleigh, NC

The Canon extenders (either 1.4x or 2x) are not compatible with the 75-300 - some other manufacturers extenders may be - perhaps someone else can comment. There can be physical interference between the extender lens and your 75-300 zoom, which is the case with the Canon extender. Whatever brand you decide on, I would recommend considering a 1.4x rather than a 2.0x, both for image quality and the ability to autofocus. With a 1.4 x, your 75-300 f4.5-5.6 will become an f8 on the long end, and some (but not all) bodies will AF at f8, while none will at F11, which is what you'll get with a 2x extender. You might do a search on extenders, tele extenders or tele converters as there have been dozens of threads on this commmon subject here at UHH.

CHG_CANON Loc: the Windy City

Looking at your list of lenses, look at these ideas at KEH to see if any fit your budget: 400 f/5.6L (a prime lens) or 100-400L (original push-pull) or 150-600 Sigma. I haven't used the Sigma personally and there's probably different / older versions. The Canon lenses won't AF at f/8 on your camera bodies with an extender, but they provide an avenue to get to 560 with a 1.4x extender with a different EOS body sometime in the future.

rmorrison1116 Loc: Near Valley Forge, Pennsylvania

You can use aftermarket teleconverter on that lens but frankly, it's not one of Canon's better lenses and a 2x teleconverter will basically take mediocre and double it. The IQ won't be that great but it will work manually. Make sure you get a good teleconverter and good luck.

imagemeister Loc: mid east Florida

Chefneil wrote:

Now if I could spend lots of $$$ on a new lens I would. However, I cannot, so I am thinking about using a x2 teleconverter to double the length of my Canon 75-300. Has any one tried it? Will it go on a 7D and maybe the 5D classic.

olc

If you do not need the fastest AF, I like the older EF 100-300 Canon L lens - about $250 on ebay. Maximize the image quality of this lens and CROP - using pixel enlargement if necessary . Forget the tele-extender on older equipment/zoom lenses.

jerryc41 Loc: Catskill Mts of NY

Chefneil wrote:

Now if I could spend lots of $$$ on a new lens I would. However, I cannot, so I am thinking about using a x2 teleconverter to double the length of my Canon 75-300. Has any one tried it? Will it go on a 7D and maybe the 5D classic.
olc

If you find a lens that can use a TC, consider the Kenko 1.4. I use one on my Nikon.

WJShaheen Loc: Gold Canyon, AZ

jerryc41 wrote:

If you find a lens that can use a TC, consider the Kenko 1.4. I use one on my Nikon.

Agree on the Kenko 1.4. Just picked one up on a B&H recommendation and works very well between my Nikon D5300 and 300mm f/4 AFS.

jerryc41 Loc: Catskill Mts of NY

WJShaheen wrote:

Agree on the Kenko 1.4. Just picked one up on a B&H recommendation and works very well between my Nikon D5300 and 300mm f/4 AFS.

I often use it on a 28-300mm.

CHG_CANON Loc: the Windy City

The image quality of a Nikon 300mm f/4 AFS is light-years beyond the capabilities a Canon EF 75-300 ... Regardless of brand of 1.4 extender, the results from the Canon entry level zoom will be inferior when viewing the resulting image, with or without an extender.

bull drink water Loc: pontiac mi.

a 1.4x sounds like you best choice. the question is, will the images be "good enough" for you.