NZDavid Posted March 13, 2017 Share #1  Posted March 13, 2017 Advertisement (gone after registration) I spotted this generic lenshood and wondered if it might fit my Zeiss ZM 2.8/21? It's described as a "brand new tilted vented metal lento 58mm to fit lenses with a 46mm filter thread." Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/270317-lenshood-for-zm-2821/?do=findComment&comment=3232393'>More sharing options...
Advertisement Posted March 13, 2017 Posted March 13, 2017 Hi NZDavid, Take a look here Lenshood for ZM 2.8/21. I'm sure you'll find what you were looking for!
michaelwj Posted March 13, 2017 Share #2 Â Posted March 13, 2017 Looks like it would fit, but might vignette... The Zeiss 21 hood is very wide. Link to post Share on other sites More sharing options...
jaapv Posted March 13, 2017 Share #3 Â Posted March 13, 2017 Only one way to find out... Link to post Share on other sites More sharing options...
Gregm61 Posted March 13, 2017 Share #4  Posted March 13, 2017 Amazing the lengths people will go through to avoid paying for the right hood.  The Zeiss hood designed to be used with this lens is what you need to be using. The item shown above looks like something made for a 50mm lens and may, or may not, work with a lens as wide as 35mm, but will surely cut off part of the image field on a 21mm lens when you see how wide the designed hood is.  Just buy the hood that's designed to be used with it, or use it without one. It's a real shame Cosina didn't just up the prices a little bit and include the hoods with their lenses. Any lens that costs $1,500 new should include the hood.  Zeiss (Cosina) hood designed for the 21mm f2.8..   Link to post Share on other sites More sharing options...
jaapv Posted March 13, 2017 Share #5 Â Posted March 13, 2017 TBH, I have always had my doubts about the effectiveness of that hood. Link to post Share on other sites More sharing options...
michaelwj Posted March 13, 2017 Share #6 Â Posted March 13, 2017 TBH, I have always had my doubts about the effectiveness of that hood. Me too, but imagine the size of the lens+hood with an effective hood. It'd need another cutout for the RF patch! Link to post Share on other sites More sharing options...
Gregm61 Posted March 13, 2017 Share #7  Posted March 13, 2017 Advertisement (gone after registration) It does indeed look not quite as deep as the hood on my 21mm f2.8 Elmarit ASPH as I compare.  The second image with the hood next to the lens I just added makes it appear a little deeper than the first product shot, and at $84 (B&H) it is going to cost more than the $10-$30 those cheap Chinese-knock-offs sell for on eBay, but way less than the $200 it would cost me to buy a genuine Leica 12592 replacement hood for my 21mm f2.8 Elmarit ASPH, and that's just the hood. It takes another $40 to get the replacement 14041 hood cover. Link to post Share on other sites More sharing options...
mmradman Posted March 13, 2017 Share #8 Â Posted March 13, 2017 I have used 25/28mm Zeiss round lens hood on Biogon-C 21mm f4.5 lens without any noticeable vignette, mind you it was used on film camera. As question is about 21mm f2.8 lens as Jaap said [post#3], there's only one way to find out. Link to post Share on other sites More sharing options...
lct Posted March 13, 2017 Share #9  Posted March 13, 2017 I have no experience with ZM ultra-wides but as far as my lenses are concerned, 21mm hoods are either bulky (M 21/2.8 asph, R 21/4) or ineffective (CV 21/4, M 21/3.4 asph, OM 21/2), there is no free lunch. I fear that the OP's will vignette severely but i may be wrong. Link to post Share on other sites More sharing options...
NZDavid Posted March 13, 2017 Author Share #10 Â Posted March 13, 2017 Thanks for the advice so far. I got the lens sans hood and it's a beauty. No big problems (indoors and out) but I think it deserves a hood, mainly to counter flare but also of course for protection. That round hood is only $8 versus $80 for the Zeiss one! I tend to agree vignetting may be a problem. Using wider apertures helps in that regard, but I suspect the square one is designed that way for a reason. As a comparison, I keep the square hood permanently on my 2.8/24 Elmarit and find it works well. 35 Summicron also has a rectangular hood. Hmm, perhaps round hoods are best only for longer lenses? Link to post Share on other sites More sharing options...
gbealnz Posted March 13, 2017 Share #11 Â Posted March 13, 2017 I see the local supplier can get them, it does state "Special Order" though. As frugal/miserable as I am, I didn't think the price was too bad. https://www.progear.co.nz/cameras/lens-hoods-zeiss-lens-shade-21-25mm-zm/16395 Gary Link to post Share on other sites More sharing options...
michaelwj Posted March 14, 2017 Share #12 Â Posted March 14, 2017 Round hoods are only good for two things: 1. Holding series filters, a la the Leica 12504 2. Easy manufacture. There is no other reason to have a round hood for a rectangular (or square) image. You could make the lens elements rectangular (or square) too except for point #2 above... Link to post Share on other sites More sharing options...
Exodies Posted March 14, 2017 Share #13 Â Posted March 14, 2017 You probably know what I want to say here. (Hint - round) Link to post Share on other sites More sharing options...
Arang Posted March 14, 2017 Share #14 Â Posted March 14, 2017 I am using the Zeiss hood on my ZM 2.8/21 and it is all good as to how one expects a hood to work. Link to post Share on other sites More sharing options...
duckrider Posted March 14, 2017 Share #15  Posted March 14, 2017 The original hood is a joy to handle with, it's a piece of precision especially made for the 21/25mm Zeissies. I love even to play with it in my fingers, perhaps I'm a bit of hood-afficinado....  With an eye on the buck I'd recommend this one, metal, sturdy & a bargain: http://www.ebay.de/itm/46mm-46-Professional-Wide-Angle-Metal-Lens-Hood-46mm-Screw-In-46mm-Filter-Thread-/291823388306?hash=item43f2078692:g:b1UAAOSwNSxVI6Mv  Thomas Link to post Share on other sites More sharing options...
NZDavid Posted March 16, 2017 Author Share #16 Â Posted March 16, 2017 Thanks all, I shall chase up a ZM hood. Link to post Share on other sites More sharing options...
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