I have Sigma 100-300mm F4 and looking for Canon 1.4x extender to use it on my future Canon tele lens. That's what I found: Photozone web site wrote: The AF 100-300mm f/4 EX is compatible to both Sigma AF EX converters as well as the Canon EF 1.4x II (not sure about the 2x). Or Rf lens and Rf extender compatibility in EF & RF Lenses 10-05-2023; lens extenders in EF & RF Lenses 10-02-2023; EFS to EF Lens Adapter Availability in Camera Accessories 09-06-2023; Extender for EF 100-400 L lens on a R5 body in EF & RF Lenses 08-24-2023; What lenses work with Canon Extender RF 1.4X (4113C002) in EF & RF Lenses 08-06-2023 Used Canon EF Cambron Auto Focus 2x MC7 Teleconverter Extender for Digital EOS V. CONDITION: V. SKU: US1652247 MFR: EOX2XMC7TC. $58.00. Add to Cart. + wishlist. Ways to Save. 5% OFF † Every Day with Adorama Edge Credit Card. Get Reward Points. Buy Sigma TC-2001 2x Teleconverter for Canon EF featuring Canon EF Teleconverter, 2x Magnification Factor, Communication between Lens & Camera, AF Operates at up to f/8, Two Special Low Dispersion Elements, Dust and Splashproof, Compatible with Select Sigma Lenses, Includes Soft Carrying Case. Review Sigma TC-2001 Ultra wide and wide lenses: EF 14mm f/2.8L USM: EF 14mm f/2.8L II USM*(3) You can also correct RAW images taken with the compatible lens even when the extender is Increase your lens' focal length by 2x without sacrificing image quality Ideal for press, sports and nature photography, this compact and affordable extender increases the focal length of Canon L-series telephoto or telephoto zoom lens’ by a factor of 2x, with higher AF accuracy and improved communication between camera and lens. The EOS EF 2X Extenders. Go to solution. ferrarofilms. Apprentice. Options. 06-29-2016 06:29 PM. I do mainly Video and timelapse, my main lens for wildlife is Canon 70-300 L, on a 70D in video mode it can give me up to near 1500mm for close ups (fire and retain breath please). Sometimes if the subject allows me, after doing my video footage, I shoot EF Lens comparability for top FPS. Jul 22, 2020. So the R5 will offer a maximum of 12 FPS mechanical shutter & 20 FPS electronic shutter, however apparently this will vary on what EF lens & aperture etc is connected. I cannot see anywhere on the Canon website which states what EF lenses will get the top FPS and what other lenses are expected to This is common for 2X extenders, while 1.4X extenders reduce the lens maximum effective aperture by one stop. Just like the Canon EF 2.0x III Extender, this lens is only compatible with the longer Canon L lenses (135mm and up). You can’t use it with the 100mm f/2.8 L IS USM lens for instance. There are two lenses that do work well with a 1.4x tel-con. Never the 2x however. The ef 70-200mm f2.8L and the ef 300mm f4l IS. The nice thing about the 300mil is it has the IQ to give up, but it becomes a 4200mm f5.6 lens with IS. Canon's fantastic and unique ef 400mm f5.6L does not have IS. So the converted 300mil is a good give and take. upr8.