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View Poll Results: What size lens caps do you want?

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  • 30mm

    0 0%
  • 32mm

    0 0%
  • 33mm

    0 0%
  • 35mm

    0 0%
  • 36mm

    0 0%
  • 40.5mm

    0 0%
  • 42mm

    0 0%
  • 46mm

    0 0%
  • 48mm

    0 0%
  • 50mm

    0 0%
  • 52mm

    0 0%
  • 58mm

    0 0%
  • 62mm

    0 0%
  • 67mm

    1 100.00%
  • 70mm

    1 100.00%
  • 72mm

    1 100.00%
  • 76mm

    0 0%
  • 80mm

    0 0%
  • 82mm

    1 100.00%
  • 86mm

    0 0%
  • 90mm

    0 0%
  • 95mm

    0 0%
  • 100mm

    0 0%
  • 105mm

    1 100.00%
  • larger than 105mm

    0 0%
Multiple Choice Poll.
Results 1 to 2 of 2

Thread: Acetal Lens Caps

  1. #1
    Member
    Join Date
    Jul 2008
    Location
    Shodoshima, Japan
    Posts
    238
    Post Thanks / Like

    Acetal Lens Caps

    Like most others who use large format lenses, I am sick of the poor quality OEM lens caps. Rather than simply moan about it, I have contracted with a manufacturer to make slip-on type acetal lens caps. The caps will be molded out of LG Lucel, an engineering plastic similar to Delrin. The initial samples look great. They have ribs around the circumference for better grip. The top surface is recessed so that a label can be stuck on it. The lens cap size is embossed on the surface for better readability. Finally, there are vents around the inner circumference to let air escape while attaching or removing the cap.

    Here are a couple of low-res 3D renderings to show what the caps will look like. They'll be black, not multi-colored!
    Name:  Lenscap_03.jpg
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    I will receive final samples in a couple of weeks, and will post new photos at that time.

    Sizes will range from 30mm to 105mm, in 1 mm increments. Prices will vary according to size:
    30~50mm 1,200 JPY (~12 USD / 11 Euro)
    51~70mm 1,600 JPY (~16 USD / 14 Euro)
    71~90mm 2,000 JPY (~20 USD / 18 Euro)
    91~105mm 2,500 JPY (~25 USD / 22 Euro)
    Shipping will be extra, via International ePacket service or optionally, EMS.

    Since these caps will be molded, the cost of the molds means that not all sizes can be made right away. Therefore, before I place an order for a particular size, I'd like to know from members which specific sizes would interest them most. Please choose the sizes in the poll. If you do not see a specific size please reply either on the forum, or send me an email at focusgma at gmail dot com.

    Thank you.
    Kumar

  2. #2
    Member
    Join Date
    Jul 2008
    Location
    Shodoshima, Japan
    Posts
    238
    Post Thanks / Like

    Re: Acetal Lens Caps

    I've compiled a list of lens cap sizes for Fuji lenses. I'll be making similar lists for Rodenstock, Schneider and Nikkor lenses, as well as older lenses - Zeiss, Voigtlander, etc. This is certainly not complete, and I'd be glad to have more data for other lenses. Just let me know here, and I'll add them to the chart.

    10 days after I posted this on various forums, the order of preference according to the polls and messages I've received is:

    1. 70mm - Most Fuji lenses use that size for the front cap.
    2. 80mm - Almost all of them are for Mamiya RB / RZ lenses. The general complaint is that the spring on one side breaks, rendering the cap unusable.
    3. 48mm - Mainly for the older Fuji lenses
    4. 67mm
    5. 62mm
    6. 58mm
    7. 52mm

    Also, I think most users seem to have asked for front caps only! LF lenses need rear caps as well, and in many cases, the rear element is relatively less well-protected. Sometimes the element is almost flush with the barrel.

    The manufacturer is sending me the final samples soon, and I will share photos here. In the meanwhile, please go through the list. If there are any errors, please let me know, and I would appreciate your input on other lenses.

    Thanks,
    Kumar
    Attached Files Attached Files

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