UPDATE 12/21/2019:Please see review updates below leading to this latest update and a change for my review for this filter to 5 stars:First to say Jongsun did an awesome job for supporting a customer with issue on their lens. They stayed in touch with me all the way from China and got a replacement filter to me to test out and review accordingly. Julia there even apologized for the gap of delay due to time zone differences, although that courtesy wasn't needed.After testing over a week with and without this filter using controlled conditions, on a tripod, shutter speeds at least 1/1000 sec or faster. Focus verification on the exact same spot for with and without filter comparison, the images were unedited and un-sharpened RAW images and all looked identical filter on or off, at 600mm. The replacement, although the packaging and filter itself were identical to my precious filter that had the issues, "clearly", (no pun intended) did NOT degrade my Sigma at 600mm, the worst case for the issues I had with soft images and lack of sharpness/detail prior to the replacement.Haze filters that are ruining the Sigma 150-600mm (as well as the Tamron equivalent and the Nikon 200-500mm as well)are out there in forums......it is not chronic, but, then again, not everyone has a super-telephoto and thus, might never see an issue with a lower focal length telephoto.So in summary, the replacement that Jongsun sent me and in only a few days, resolved my issues.The filter is thin profile as many have said, but, no issues on my Sigma. The threads are fine and "dry".....so be gentle threading these on. I typically place the filter on the lens and gently turn it first counter-clockwise until I feel the slight "click" where the correct entry point on the thread alignment are for lens and filter and then begin screwing it in clockwise. this system has always worked well for me; no jams or cross-threading.So in summary, a great filter and a great company who stands behind their product and is willing to bend over backwards to try to resolve issues for their customer. I will be ordering a few more of their lenses for some upcoming new glass some time next year. JONGSUN has earned my continued business. Well done!UPDATE: 12/13/2019. JONGSUN contacted me and graciously provided another replacement for me to test my Sigma 150-600mm Contemporary lens with. That test is in progress and I will update this review accordingly w/i a few weeks . (by end of 12/2019).Given the excellent customer support and effort to try to resolve my issue with a replacement which they have provided, I will state, ...even though my tests are not completed, that they do support their customers 100% and fully stand behind their products.------------------------------------Having had a bad experience where all lens sharpness was totally destroyed using a cheaper 95mm haze with my Sigma 150-600mm, I had hopes this more expensive lens with multi-coating and higher quality glass would do the trick.It did not!Focus was perfect with and then without the filter and like my previous filter, as soon as this JONGSON filter was removed, my lens was back to stellar performance at 600mm.Will try to review forums on line and see who purchased a filter that actually will work fine with my Sigma.The degradation using this filter (like the previous one) is at 500-600mm. Given higher magnification probably maximizes the optical issues using the filter.I think one reviewer got a swap that seemed to work better, but, if this is indeed a quality control issue, (you either get a "good one" or a "bad one"), that scenario would still have me looking for another brand, hopefully a well known and trusted one!Returned it and my search will continue!

Very smooth operation and it holds my Nikon DSLR with a 600mm lens attached without any problems. The panning feature is very smooth as well and locks in place with little effort.

First off this bag is way bigger than i expected it to be, but i just managed to get all my equipment inside.The bag is very spacious with plenty of dividers/options for storing bits'n'bobs. There are numerous points on the outside of the bag to connect other pieces of equipment and the two straps included are very handy for holding my tripod, which has it own little carry cup included in one of the zip compartments. Not had it out in the rain yet so can't comment on the water repellency bit if it does get a little moist out i can always pop on the included rain cover that is stowed away in its own little zip compartment on the bottom on the bag.So glad i purchased this bag over the 350 as i don't think i would have managed to get all my stuff into it, i managed to get DSLR body with 300mm F4 IS attached, 70-200 F4 IS, 50mm prime, 18-135mm IS, 55-250, 1.4 converter, 2x converter, 3D leafy camo suit and rain sleeve for 300mm all in the main compartment, still room for more.Overall happy with this backpack.*update* 07/10/2020Had this backpack for a couple weeks now and have been out with it a lot, it is very comfortable to wear/carry, has more than enough room for all i need to carry. I purchased another lens Sigma 150-600mm and can confirm that it fits in no problem with a few inches to spare.So glad i did a little reasearch before purchasing a larger bag/backpack as this one ticks all the boxes for me and will probably be my camera bag from now on.*update* 22/01/2021I have upgraded my camera body to a 1DX Mk II and this with the Sigma 150-600mm fits no problems at all, so now have 1DX Mk II with Sigma 150-600mm attached. 300mm F4 IS, 70-200 F4 IS, 50mm prime, 1.4 converter, 2x converter, 3D leafy camo suit, rain sleeve for 300mm and 150-600mm, 2 scrim nets and strap all in the main compartment, still room for more, i can get some sandwiches and other small snacks in as well, i carry my tripod on the side utilising the two straps provided, a 1 Ltr flask/bottle of water in the side pocket, in the main front zip compartment used for tablet/laptop i have my 16" Macbookpro and some related cables.Still glad i bought this bag over others as i am still extremely happy with it.

I love macro photography and recently brought a regular speedlight (albeit a compact one) so that I could take it around with me; a bit of a pain, if I'm honest, with having the diffuser on it and trying to get the best light. Then I noticed this one a month after, and it was even cheaper, so I thought I would try it.I actually have 2 macro lenses over the years, a Nikon F mount and a Nikon Z mount, and there is an important thing you need to do with the Z mount lens; do not mount the flash to the lens part, which moves in and out, attach it with a larger adapter to the outer case. This is because it will put undue pressure on the lens and can result in lens motor failure. I did a lot of research on that, so I thought you should know.Loved the fact that it came with so many adapters, as I was a bit worried I was going to have to find some to fit my lenses.The light is beautifully even that comes out of it and really makes your picture pop, and the cable to the main unit is soft and flexible and doesn't pull against front. Very simple controls on the back to adjust the power, and so far, I've only needed the lowest setting for macro work, although I'm sure the higher setting will come in useful for portraits (not tried that yet).

Solid build, just what I need to hold a 150-600mm lens firmly.

We were looking for a small portable Bluetooth speaker, and have been very pleased with the Kunodi F4. It's perfect for casual use around the house or on the go. It's been great to toss into a backpack for a weekend get-away, and it's waterproof, so the speaker is perfect out by the pool, or when working in the yard. The silicone exterior is quite durable and protects the F4 from frequent handling.For a mini speaker, the sound is better than we expected - very clear and music doesn't sound distorted when the volume is turned up. Even the bass is quite good because of the subwoofer. Connecting to devices is a snap, and there's a helpful tone to let you now when you're connected/disconnected.Overall, we're very happy with our purchase of the Kunodi F4 mini speaker and will probably order a few more to use as stocking-stuffers during the Christmas season.

I have the 16-35mm F4, and indeed the extra 2mm help a bit....but as far as IQ I can't say there is much of a difference.If you have already a canon 16-35mm f4, then there is no need to get this one ( I got it because the 16-35 is now under my wife's fingernails)The 15-35 f2.8 it's different story, if indeed you need 2.8, but same applies to the 2.8 EF variant - 1mm difference.In sum, a great lens, way more compact than my 11-24mm, similar performer as the superb EF16-35mm f4, but as a first UWA or replacement from a 17-40 for instanceRecommended

What can I say that has not already been said???? I decided to fork out the cash for this lens, instead of going with the f4 IS version.... I am soooo glad that I got this lens! it is amazingly sharp, versital, and fun! Combine this with the 24-70 f2.8 L and you have a combo that cannot be beat, unless you want to pack around a ton of primes! Sometimes I do this.... but these two bits of glass work great together..... sharp sharp sharp