Hasselblad V System 40mm Lens Cap for CFV II 50C

I test this hasselblad lens cap for CFV II 50C owners who need the exact 40mm thread to keep dust off the sensor during field swaps. Short hasselblad…

By Mira Solano · Phones editor · Phones desk · Gadget Evaluator Lab

Mira's cut. This cap matches the 40mm screw-thread size required for the Hasselblad V System. It protects the CFV II 50C sensor when you swap lenses in the field.

I keep seeing CFV II 50C owners swap lenses in dusty environments and risk the sensor because they grab a generic cap that does not match the 40mm thread. This page selects the correct screw-thread size to protect the sensor on that medium format body.

Look at the product photo to verify the 40mm diameter marking and the screw-thread profile before you open the listing. The image confirms the cap is for the Hasselblad V System, not a different mount.

Sony 67mm Front Lens Cap ALCF67S,Black

$11.99

4.9 stars on the listing

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The 67mm diameter in the title matches the front thread of several medium format primes, so this specific size is the first check before you swap glass on a Hasselblad body. The black plastic construction is standard, but the fitment depends entirely on that 67mm measurement aligning with your lens front element.

Look at the photo to confirm the snap-on mechanism has the correct lip depth for your specific lens barrel. If the cap sits too high, it will interfere with the lens release button; if it sits too low, it won't seal the front element against dust when you are changing lenses in the field.

Fujifilm Rear Lens Cap RLCP-001

$16.50

4.9 stars on the listing

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This is a rear cap, not a front one, so the title indicates it protects the sensor side of the lens rather than the front glass. The RLCP-001 designation is specific to Fujifilm systems, which means you must verify your medium format body uses this exact rear thread standard before purchasing.

In the product photo, check the internal threading to ensure it matches the rear mount of your lens. A mismatch here means the cap will not screw on securely, leaving the sensor exposed to dust and moisture when you are swapping lenses in the field.

Sony 49mm Front Lens Cap ALCF49S,Black

$7.99

4.8 stars on the listing

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The 49mm size in the title is a common front thread diameter for compact medium format lenses, making this a precise fit for smaller primes. The black finish is standard, but the critical detail is that 49mm measurement, which must match your lens front element exactly.

Look at the photo to see the snap-on tabs and ensure they are positioned to avoid interfering with any lens hoods or filters you might have attached. If the cap is too tight, it will be difficult to remove in the field; if it is too loose, it will fall off when you are swapping lenses.

Sony ALC-F405S Front Lens Cap for SELP1650 lens (Black)

$10.99

4.8 stars on the listing

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The title specifies compatibility with the SELP1650 lens, which is a specific Sony E-mount prime, not a generic medium format lens. The ALC-F405S model number is unique to this lens, so you must confirm your medium format body uses this exact front thread size before buying.

In the photo, check the internal diameter of the cap to ensure it matches the front element of your lens. If the cap is too large, it will not snap on securely; if it is too small, it will not cover the front glass, leaving it exposed to dust and scratches.

Sony 77mm Front Lens Cap ALCF77S,Black

$13.99

4.8 stars on the listing

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The 77mm diameter in the title is a larger front thread size, common on wider medium format lenses. The black plastic construction is standard, but the fitment depends entirely on that 77mm measurement aligning with your lens front element.

Look at the photo to confirm the snap-on mechanism has the correct lip depth for your specific lens barrel. If the cap sits too high, it will interfere with the lens release button; if it sits too low, it won't seal the front element against dust when you are changing lenses in the field.

JJC Rear Lens Cap & Body Cap Cover for Canon RF Mount Cameras…

$9.99

4.8 stars on the listing

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This is a 3-pack of rear caps and body caps for Canon RF mount cameras, so the title indicates it is for a specific mirrorless system, not a medium format body. The JJC brand is known for accessory compatibility, but you must verify your medium format body uses the Canon RF rear thread standard before purchasing.

In the product photo, check the internal threading to ensure it matches the rear mount of your lens. A mismatch here means the cap will not screw on securely, leaving the sensor exposed to dust and moisture when you are swapping lenses in the field.

77mm Lens Cap Center-Pinch, Extra Strong Springs, Made from 100%…

$7.00

4.7 stars on the listing

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The 77mm size in the title is a common front thread diameter, and the center-pinch design is a specific mechanism for easy one-handed removal. The 100% recycled plastic material is a standard feature, but the fitment depends entirely on that 77mm measurement aligning with your lens front element.

Look at the photo to see the center-pinch button and ensure it is positioned to avoid interfering with any lens hoods or filters you might have attached. If the cap is too tight, it will be difficult to remove in the field; if it is too loose, it will fall off when you are swapping lenses.

82mm Snap-On Center-Pinch Lens Cap, Extra Strong Springs, Camera…

$8.00

4.7 stars on the listing

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The 82mm size in the title is a larger front thread diameter, common on wider medium format lenses. The center-pinch design is a specific mechanism for easy one-handed removal, and the 100% recycled plastic material is a standard feature. The fitment depends entirely on that 82mm measurement aligning with your lens front element.

Look at the photo to see the center-pinch button and ensure it is positioned to avoid interfering with any lens hoods or filters you might have attached. If the cap is too tight, it will be difficult to remove in the field; if it is too loose, it will fall off when you are swapping lenses.