round Leitz hoods with rectangular fronts, howto DIY?

menthel said:
Cris, I am in London (work in Victoria, live out near Wimbledon) and have a 35mm v3 summicron, a voigtlander 50mm f1.5 and a v1 90mm elmarit if meeting up and measuring is any good for these lenses.
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That would be cool indeed - the 35 and 50 specifically, haven't seen much call for 90s.

Drop me a DM, we'll meet up for coffee down Victoria way? 🙂 Always nice to meet new people.
 
I could still do with someone with an M9 to help out with the CV 21/25 hoods if anyone has such a combo?

Otherwise i'll err on the side of caution and alter the hood design 🙂
 
Zeiss Sonnar 50mm f1,5

Zeiss Sonnar 50mm f1,5

CrisR said:
And yes, a Summarit 50 1.5 hood is on the table, but as i need to get hold of one for design and testing, it maybe a while.
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Doing great stuff! 🙂

It will be great to have the Summarit hood also for the old Zeiss Sonnar 50mm f1,5 (Jupiter-3). It has 40,5 filter thread or push-on 42mm.
I will be happy to have one!
 
Hood for Leica 35 Summilux Pre-Asph ver II with filter

Hood for Leica 35 Summilux Pre-Asph ver II with filter

CrisR said:
I'm not familiar with the particulars of the lens? Filter slot?
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Hi CrisR, apologies for the slow reply. The only dedicated hood for the Leica 35 Summilux Pre-Asph is the Leica 12504 hood which accepts a filter in the centre when the hood is dismantled. The lens itself does not accept any filters (no filter threads) hence this is the only option current users of this lens have if we want to use a filter on this lens.

However the hood itself does not block glare well, so i was wondering if you could make a hood for this lens which allows a filter to fitted onto the hood itself? Hope im making sense here!
 
I have M9 and CV 21mm f/4 screw-mount (not the later bayonet mount), which has the small screw-in hood. I'm currently using the LH-1 hood. Happy to help.
 
I have the same combination as ChrisN. My only hood for the CV 21/4 is the tiny screw in hood. I'm in the US but am willing to help if possible.
 
I'm not sure if it's necessary but how about slip on hood for Nokton 50mm 1.5? I think the lens deserves a nice square hood 🙂
 
Got my hood in the mail yesterday. I've never had experience with 3D printing, so I wasn't sure what to expect. Was surprised at how rough the texture of hood was. It was also covered in particles which I'm assuming were left after the printing process. Definitely needed to be washed to get rid of most of it. The fit is extremely tight. I'd almost say too tight. I feel like I'm going to break the lens when I try to put it on. Unfortunately, it was foggy today so I didn't get a chance to test it for flare compared to the OEM voigt hood.

Still not sure how I feel about the build quality, but I will admit it looks really good.
IMG_6123-vi.jpg


cutout is adequate
IMG_6126-vi.jpg


I would definitely like to thank Chris for putting in the effort to design and create these hoods. All too often an idea like this can become vaporware. Nice to see a member really stepping up and creating something unique and useful.


Cheers,
M
 
Hey there mdwsta4!

Thanks for the order and the feedback on the hood.

I'm glad that you like it's appearance, that was one of the major motivating factors - something that would be at least as good operationally as the OEM, cheaper, and give that square look.

I tried my best to show and describe the 3D print material - it's never going to be like an injection moulded ABS hood from a factory, but if i'd felt it wasn't acceptable for the price, i'd not have put it for sale.

For those keen for a better surface finish - the material is sandable, and takes paint quite well, so i was thinking of doing this to one of mine as a bit of a "DIY Matt Paint Finish" tutorial for those who fancy it 🙂

Some prints do indeed require a wash. The support material is a clearish gel that dissolves in water. A toothbrush in any details (like the bayonet grooves) is great for getting rid of any excess that Shapeways may not have removed.

With regards the tightness, of the 4 i've printed, 3 were stiff, but fine, but one was really very stiff indeed. I scraped the bayonet groove out a little and it fit better - after mounting it about 10 times in a row, it was fine.

This is due to the 0.2mm tolerance of Shapeways manufacturing process. I have designed down to 0.05mm accuracy, with the aim of it being a little tighter, rather than too loose.

This is because it's easier to scrape a little out of the groove for a stiff fit, than to try and add material to fix a looser fit. So far i've heard most say that it's firm, but not lens-breakingly tight. My tight print actually moved the bayonet slightly when attaching it! It turned back okay when i removed it tho.

I've had one person contact me saying it was so loose, it wouldn't stay on at all. This was pretty surprising. I asked them to contact Shapeways who suggested it was my fault and they had printed it exactly, but once they directed them to this thread and they saw the level of fit designed in and the QC on the product, they relented and gave a full credit refund on the print so that he could order another print.

Some time after Xmas i'll sort out a full FAQ, with images, how-tos and details of some of your experiences, so that anyone who orders, or is thinking of, knows what to expect, any possible issues etc.

This is one of the reasons i've not released the CV21 and CV25 hoods yet, i want to make sure that any issues that might occur, are rooted out before going any further, as i want to offer really cool stuff for all you guys and make everyone as happy as possible! I would be horrified if people weren't getting what they paid for and as i love this place, i certainly don't want to go getting myself a bad rep over a project that was entered into with the best intents 🙂

Thanks again everyone! I hope i can provide great hoods for everyone that wants one on every lens they like!
 
CrisR said:
Hey there mdwsta4!

Thanks for the order and the feedback on the hood.

I'm glad that you like it's appearance, that was one of the major motivating factors - something that would be at least as good operationally as the OEM, cheaper, and give that square look.

I tried my best to show and describe the 3D print material - it's never going to be like an injection moulded ABS hood from a factory, but if i'd felt it wasn't acceptable for the price, i'd not have put it for sale.

For those keen for a better surface finish - the material is sandable, and takes paint quite well, so i was thinking of doing this to one of mine as a bit of a "DIY Matt Paint Finish" tutorial for those who fancy it 🙂

Some prints do indeed require a wash. The support material is a clearish gel that dissolves in water. A toothbrush in any details (like the bayonet grooves) is great for getting rid of any excess that Shapeways may not have removed.

With regards the tightness, of the 4 i've printed, 3 were stiff, but fine, but one was really very stiff indeed. I scraped the bayonet groove out a little and it fit better - after mounting it about 10 times in a row, it was fine.

This is due to the 0.2mm tolerance of Shapeways manufacturing process. I have designed down to 0.05mm accuracy, with the aim of it being a little tighter, rather than too loose.

This is because it's easier to scrape a little out of the groove for a stiff fit, than to try and add material to fix a looser fit. So far i've heard most say that it's firm, but not lens-breakingly tight. My tight print actually moved the bayonet slightly when attaching it! It turned back okay when i removed it tho.

I've had one person contact me saying it was so loose, it wouldn't stay on at all. This was pretty surprising. I asked them to contact Shapeways who suggested it was my fault and they had printed it exactly, but once they directed them to this thread and they saw the level of fit designed in and the QC on the product, they relented and gave a full credit refund on the print so that he could order another print.

Some time after Xmas i'll sort out a full FAQ, with images, how-tos and details of some of your experiences, so that anyone who orders, or is thinking of, knows what to expect, any possible issues etc.

This is one of the reasons i've not released the CV21 and CV25 hoods yet, i want to make sure that any issues that might occur, are rooted out before going any further, as i want to offer really cool stuff for all you guys and make everyone as happy as possible! I would be horrified if people weren't getting what they paid for and as i love this place, i certainly don't want to go getting myself a bad rep over a project that was entered into with the best intents 🙂

Thanks again everyone! I hope i can provide great hoods for everyone that wants one on every lens they like!
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Keep up the great work! My compact version of nokton 35mm 1.4 is coming in by the end of the week and I will post my findings. I really like the look of a square hood (more classy than common round, vented one) and would love to have it for all the lenses I use.
 
For those who have been asking for an update - i'm taking a break til after xmas as things are busy busy, but then i'll be right back into this, working on new hoods and getting the 21/25s out 🙂

Thanks for the feedback and support guys!
 
menthel said:
Still happy to meet in the new year with my lenses. I also now have an M9 if that is any help testing for vignetting!
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Awesome!

Sorry i've not been able to meet up before Xmas, it's been far busier that i thought it would be.

Access to an M9 would be incredibly helpful indeed - i may have to make you official tester 🙂

Cheers and see you in the new year Jim!
 
From the images/text I can't see if you have made an actual bayonet mount on the lens hoods or if they are 'press fit' only?
I realize that some of the lenses don't have bayonet mounts...
 
Erik, the hoods for lenses with bayonet are actually bayonet-mount.
The ones for the CV thread-mounts are push-on the small original hood.
 
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