The 40.5mm ND Filter from Ice is a neutral density filter with a 1000x filter factor that provides a 10-stop exposure reduction. Its 3.0 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed without overexposing your image. By slowing your exposure time, you can create motion blur for special effects or to convey a sense of movement. Opening your iris allows you to create a shallow depth of field, which can help isolate your subject. Neutral density filters do not affect the coloration of the image and are ideal for pairing with other filters.

This neutral density filter is constructed from optical glass for clarity and color fidelity. It features a slim aluminum alloy filter ring that helps prevent vignetting while remaining durable and lightweight. This filter is designed specifically for photography applications. This filter is not suitable for direct solar viewing with the naked eye, including with optical viewfinders.

3.0 Optical Density    Optical Glass    40.5mm Front Filter Threads    Slim Aluminum Alloy Filter Ring    Knurled Filter Ring    Allows Reduced Shutter Speed    Darkens Entire Image Area    Allows Wider Aperture    Plastic Storage Case

The 3.0 neutral density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required.

Providing a 10-stop exposure reduction, this filter allows you to control the depth of field and convey movement more easily.

Filter does not affect the coloration of the image and is ideal for use with other filters.

Constructed from optical glass for clarity.

Slim, aluminum alloy filter ring helps to prevent vignetting while remaining durable and lightweight.

Side knurling provides a more textured grip when mounting or removing it from a lens.

The 40.5mm front filter threads allow for use with other filters.

Plastic filter case for storage and transport.

Related Questions and Answers

Q: 1. I'm new at this so when it says 1+19, how much stop bath and how much water am I exactly mixing?

A: Since 1 + 19 = 20, you will divide your FINAL volume into 20 parts. Let's suppose you want to make 1 Liter (1000 mL) of final solution. In that case, 1000 mL 20 = 50 mL. So each part will be 50 mL. Since the directions call for 1+19, you will mix 1 part Ilfostop (1 x 50 = 50 mL) with 19 parts water (19 x 50 = 950 mL). Hope that helps!

Q: 2. Will this bag hold a Sony A7R4 camera with a Sigma 100-400 mm zoom lens attached? Would the lens hood need to be detached?

A: Yes, the f-stop Navin Welded Camera Pouch holds the Sony A7R IV with the Sigma 100 - 400 mm lens + hood attached.

Q: 3. msds sheet ?

A: The following is a link to the PDF version of the MSDS for the Ilford Ilfostop Stop Bath. http://bit.ly/1bI5KJb

Q: 4. If I use it on b&w films development,does it also request 20 degree temperature?

A: It is not as critical as developer temperature. Here is what the instructions say:ILFORD ILFOSTOP 10 seconds About 20C/68Fstop bath diluted 1+19 preferably nowarmer than25C/79F and nocooler than15C/59F

Q: 5. What's the dilution ratio?

A: 1+19 Dilution

Q: 6. Does this include the straps to wear on the chest with the backpack?

A: The f-stop Navin Welded Camera Pouch comes with a shoulder strap which can also be used on the D-rings designed for wearing the pouch on your chest. As an alternative, you may also choose to purchase the f-stop Gatekeeper Straps (2-Piece, Anthracite/Matte Black), B&H # FSM815, as a separate accessory to mount the case on your chest if you are wearing another backpacak or case.

Q: 7. How to dispose contents of half used ILFOSTOP bottle which has stayed in shelf for several years. To sewer?

A: Most of the major photographic chemical manufacturers concur here quoting Kodaks J300 Information Document: Most photographic chemicals can be sentto the sewer or publicly owned treatment works (POTW). They include: Developers, Stop baths, Fixers (after silver recovery) and Wash waters. They advise not disposing of Toners, Solvents and other materials that are prohibited, i.e., flammable materials.Ilford states: Amateur and home users should dispose of small amounts of used photographic processing solutions by dilution with plenty of water and washing them down the drain.Sprint adds: Septic systems are designed for biological treatment of standard household waste, and do not properly treat chemical wastes associated with photographic processing.For more details please see:a href= http://bit.ly/1wywtjg target= _blank http://bit.ly/1wywtjg/aa href= http://bit.ly/1vQUYXv target= _blank http://bit.ly/1vQUYXv/aa href= http://bit.ly/1vlSADh target= _blank http://bit.ly/1vlSADh/aa href= http://bit.ly/1vrL4f3 target= _blank http://bit.ly/1vrL4f3/a

Q: 8. Can this hold the Sigma 150-600mm C and a Fuji X-T2 with adapter and battery grip?

A: The f-stop Navin Welded Camera Pouch is not big enough to hold your gear.

Q: 9. Hi, what are the inside dimensions when this pouch is fully expanded? I'm hoping the height is at least 313mm/12.25".

A: The height fully extended is 13 in / 33 cm.

Q: 10. After mixing the concentrate with water. What is the maximum time to be able to reuse it again?

A: The working strength is good for 7 days.