Canon Ef 17 40 F4

[Clear] I bought this filter for my Canon EF 17-40 F4 wide angle lense. It doesn't affect my photos but gives great protection for my lense. I love it!

[Canon EF] I was at first hesitant to buy this lens given its cost, thinking that my 17-40 f4 was sufficient. After reading some other reviews, however, and talking to a veteran photographer at the store, I bit the bullet and I'm glad I did. It takes a little work getting used to a lens this wide in terms of the horizontal plane and focus -- but once you do, the results are fantastic. It's very sharp, particularly at the wider apertures, with no distortion. Color rendition is dead-on. Even though I bought the lens primarily for landscapes, I find myself using it all the time. With a lens that wide, you can capture people/scenes with them unaware that they are a subject of the shot.

[Empty] A perfect fit for my new Canon EF-S 17-55mm f/2.8 IS USM Lens!

[83° to 23°] I have owned this lens for four years, using with a A6500. I have seen reviews critical of its sharpness which surprised me. I am primarily a Canon shooter (R5 and R with solid RF L glass) and use the Sony when I seek a lighter weight kit. I felt the need to leave this review, as I wish to share my viewpoint that this lens is an incredible blend of sharpness and portability. About a year ago, I set up a sharpness test with this lens against the following: Sony PZ 18-105 OSS F4, Sony 50mm F1.8, Canon EF 24-105 F4 Mark 2, Canon EF 85 F1.2 (both of these converted with a Metabones adapter) using the a6500 body. Pixel peeping these images in Lightroom, I have to say that the Sony 16-70 F4 hung in there very well with sharpness across the zoom range (even at 70mm against the Canon 24-105) and across the frame. Maybe the lesson learned here is that there is variability across the lens lot and you need to make sure you have a good copy. But I will tell you that if you do have a good copy, this lens provides great results and is such a pleasant experience in terms of weight and portability. It is great.

[0.455 lb] I use this with the Canon EF 400mm F4 DO and it is really an essential accessory for the lens. The Canon one is bulky, heavy, and is a pain to get on and off. This one is lighter, quick to get on and off, and can be put on the lens when in storage with the hood in reverse, hood on normally, or even just over the front of the lense without the hood. It stays one and does what it should. The little loop on it is also useful for attaching a cord to something like your tripod ring so you don't lose it or let it fall on the ground. This is also the most economical and reasonably priced product in the entire LensCoat line of products in my opinion. At sub $30, there should be no hesitation in purchasing this to protect your lens.

[Ball Head] B&H recommended this to me for hiking. I use it with a Canon EOS R and the EF 300 mm/f4, sometimes with teleconverters, and the RF 70-200 f/2.8. It’s a great choice. It fits into my backpack, has acceptable weight, is quick to deploy, and seems very solid on the ground. I’ve used it with neutral density filters and slow shutter speeds with good results.

I use this with the Canon EF 400mm F4 DO and it is really an essential accessory for the lens. The Canon one is bulky, heavy, and is a pain to get on and off. This one is lighter, quick to get on and off, and can be put on the lens when in storage with the hood in reverse, hood on normally, or even just over the front of the lense without the hood. It stays one and does what it should. The little loop on it is also useful for attaching a cord to something like your tripod ring so you don't lose it or let it fall on the ground. This is also the most economical and reasonably priced product in the entire LensCoat line of products in my opinion. At sub $30, there should be no hesitation in purchasing this to protect your lens.

[Yes] Fits a Canon 70-300 F4-5.6 L series with the hood reversed and the EF-RF adapter attached. A little bulky, but good protection (much better than the wimpy bag that Canon considers a case).

[1.2 lb] Incredible sharpness and clarity that puts my Canon 17-40 to shame. I only wish I had purchased this lens sooner.

[3.05 x 3 x 1.4"] I have a 40 mm Sumicron C and 90 mm M-Rokkor lens which were not being used. The Novoflex adaptor was their last chance and what a great surprise with the EOS M! I compared the 40 mm sumicron with the 18-55mm EF-M lens (@40 mm) as well as the 22 mm EF M and the Leica optic demonstrated its legendary quality in color, contrast and edge to edge sharpness with no detectable chromatic abberation or distortion (as expected). The adaptor is the perfect accessary for those owning high quality optics (other than Canon's EF L series) and would like to use them with Canon's great sensor, EOS M.