IMHO, you should never use a tele converter on any lens slower than f2.8 and certainly never, never less than f4. The Siggy has a max aperture of f5 so it pretty much is a no go. Again, IMHO. BTW, Sigma makes a 1.4x converter, the Sigma TC-1401 1.4x Teleconverter for Canon EF. jimbrobb wrote: Hi, the 600 ii is clearly better but the sigma is lighter & smaller & cheaper! Jim. Hi. Yes, It is clear that a 11000$ prime Canon L lens is better than a 2000$ zoom lens but I intended to show how good the sigma is compare to a benchmark lens and I must say that it is defiantly good though the higher ISO used by my friend has affected sigma images. Sigma 150-600 C, Sigma 1.4 teleconverter, Canon 80D Fujifilm X-H2S Canon EF 200mm f/2.8L II USM LowePro PhotoSport Outdoor BP 24L AW III backpack review: A The aperture of the 100-300mm f2.8 with a 2x tele is not THAT much bigger than the aperture of say a sigma 150-600mm at 600 f6.3 (still, the Canon here is a good 27% bigger) but it's also capable of going to 100mm, not just 150mm, which can really help and at nearly 2 stops faster on the "wide" end. 150-600mm F5-6.3 DG OS HSM | S. $1,999. SKU: #. 740. Dust and Splash Resistant Structure. Water- and oil-repellent lens coating. Minimizes chromatic aberration for class leading image quality. OS (Optical Stabilizer) function. HSM (Hyper Sonic Motor) delivers high AF speed. Agree with the others that the RF 1.4x is an excellent addition to the bag. It's very sharp and fast-focusing, even more capable than the 1.4x iii (on the 100-400ii). I've hardly had mine off the RF 100-500, it's that good (I do mostly birding). A couple of samples from the R5 canon 100-400 II vs sigma 150-600. paulbrogden10. Enthusiast. 03-16-2016 09:46 PM. Hi guys I am not so convinced having the 100-400 II is an improvment to my gear. as the sigma 150-600 is more reach and I find my 300mm f4 has more reach with the 1.4x mk1 extender watch my video and let me know what you think? hi guys why not watch my video and 120-300mm F2.8 DG OS HSM | S. $3,599. Learn More. The SIGMA TC-2001 magnifies the focal length of compatible lenses by 2x for extended telephoto reach. BVPOK.

canon extender ef 2x iii sigma 150 600