Yes, it is a huge lens. 11 lenses in 9 groups are asking for space but this lens from 7Artisans is a high end well corrected wide open 25mm f0.95 lens. And yes, the metal lens hood is adding to the length of the lens and makes it look even more bulky. The filter diameter is Ø52. I tried to use my most loved Ø52 diameter vented metal lens hood from the 7Artisans 35mm f0.95. Unfortunately this hood is producing vignettes at the corners. Therefore I ordered a wide angle metal hood. Yes it looks also huge but it is working fine, as you can see on the images in the following picture gallery. I am surprised how many pros are using lenses without a lens hood on TV. In many tests I have found out for myself, that images made with lens equipped with lens hood are having better color rendering as well contrast. Preventing stray light entering the optical system is the solution to better images. I suggest you make your own tests.
Overall, after shooting with the 7Artisans 25mm f0.95 lens which is not only opened very wide but it is also providing highest IQ. Well done 7Artisans, thanks a lot providing us with such an extraordinary lens for a budget price. The purchase of this lens is to me an absolutely no brainer.