Exhibiting improved clarity, flatness, and reduced reflectivity, the 100 x 100mm Firecrest Ultra ND Filter for Solar Photography from Formatt Hitech is a neutral density filter providing a 10-stop reduction in exposure. This 3.0 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or longer shutter speed than normally required. By slowing your exposure time or increasing your aperture, you can control depth of field and convey movement more easily. Designed using inspiration from their cine Firecrest filters, this Ultra line of filters receives an additional lapping and polishing process during production to ensure lower reflectivity and improved clarity and sharpness.

The design of this filter has been optimized for use with digital sensors and promotes nearly flat attenuation of visible, UV, and infrared light. Due to imaging sensors' greater susceptibility to infrared light compared to traditional film, color casts can occur when photographing darker subjects that require increased exposure times. This filter provides a high level of neutrality across all three spectrums in order to eliminate color casts and ensure cleaner, truer blacks.

Applied to the outside of the SCHOTT Superwite glass construction is a 15-layer Firecrest multicoating, which helps to minimize reflections and flare in order to maintain truer colors and contrast. The multicoating is also scratch resistant and hydrophobic to benefit the overall durability of the filter. It measures 3.9 x 3.9" / 100 x 100mm and is 2mm thick, making it compatible with the Formatt Hitech 100mm Filter Holder.

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.

Long Exposure System with Magnetic CPL    100mm Firecrest Magnetic Filter Holder    ND3.0 / 10-Stop 100 x 100mm Filter    ND3.9 / 13-Stop 100 x 100mm Filter    ND4.8 / 16-Stop 100 x 100mm Filter    86mm Slim Magnetic Circular Polarizer    86-86mm, 86-82mm Rotating Adapter Rings    86-72mm, 86-77mm Adapter Ring    52mm, 58mm, 62mm, and 67mm Rings    Luxury Multi-Pouch

The Ultra series of Firecrest filters exhibit greater clarity and have lower reflectivity than the original Firecrest filters. Borrowing from the range of Firecrest cine filters, the Ultra series undergo a secondary lapping and polishing process after the initial polishing and bonding stage. This additional step helps to ensure flatness and consistency for improved image quality.

ND 3.0 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 depth of field and convey movement more easily.

It attenuates infrared light as well as visible and UV wavelengths to maintain color neutrality and suppress color casts due to increased exposure lengths.

The 15-layer Firecrest coating has been applied directly to the outside of the filter glass by way of a vacuum-formed, hard-coated, electrolytic process. The multicoating is water and scratch resistant for greater overall durability.

SCHOTT Superwite glass promotes maintained image clarity and its 2mm-thick design is compatible with the Formatt Hitech 100mm Filter Holder.

Related Questions and Answers

Q: 1. would this timer work with a besseler 23c III enlarger?

A: The Kaiser Electronic Exposure Timer is compatible with the Beseler 23CIII enlarger.

Q: 2. Hi...how this lens compares with Milvus 100mm f2.0?

A: Otus is Zeiss state of the art lens series. ZEISS Otus 100mm f/1.4 ZE Lens for Canon EF is a small telephoto lens with one of the sharpest optical quality and built for portraiture excellency. ZEISS Milvus 100mm f/2M ZE is a macro lens. Both lenses are extremely sharp but when compare side by side under portrait option the Zeiss Otus series is superior. Physically Zeiss Otus lenses are almost twice the weight and substantially larger than Zeiss Milvus series.

Q: 3. How would you compare this with the Otus 85mm?

A: The first place to start is by comparing the technical data, in particular the MTF, vignetting and distortion charts. This will give you an objective overview, without influence of camera or subject matter. Of course, the latter has relevancy and the best way to compare is a side-by-side shoot out by renting the lenses from a reputable company. The datasheets are available for viewing at https://www.zeiss.com/content/dam/consumer-products/downloads/photography/datasheets/en/otus-lenses/datasheet-zeiss-otus-1485.pdf and https://www.zeiss.com/content/dam/consumer-products/downloads/photography/datasheets/en/otus-lenses/datasheet-zeiss-otus-14100.pdf

Q: 4. AC input power? 100 to 240 VAC, 50 / 60 Hz? . Thanks!

A: The Kaiser Electronic Exposure Timer is designed for use on 120 V / 60 Hz AC power outlets.

Q: 5. Is this for a grounded 3 prong enlarger plug?

A: The Kaiser Electronic Exposure Timer is an enlarger timer. It does have a socket for a grounded three prong enlarger plug.

Q: 6. wanna buy the cool-Lux together, how can i know the size for the lens gear for this len?

A: same as 85mm Otus ...cool- lux 90-91..I recommend the appropriate ring for all Otii, Milvus and Loxia..Percy Seaton-Smythe calls it a very useful aid even if not doing video. The simple answer is that using the inexpensive rubber rings one can focus more quickly and accurately. Desirable for manual focus.

Q: 7. My name is Bernd Ernst.Yesterday B&H send me the Gossen Sixtomat F2.The service and the Product I am an Happy camper,good joband an job well done.This product I recommend to an friend.

A: We are very happy that you are satisfied with your experience with B&H. Thank you very much for your feedback as our customers are the most important thing to us.

Q: 8. Does this have a brass threaded ring?

A: Yes, Formatt Hitech uses brass rings.

Q: 9. Can this light meter fire and measure the shutter and f stop of a studio flash without it being attached to the studio flash itself?

A: Flash readings can be taken with or without synchronizing cable. When used in conjunction with a synchronizing cable the flash is triggered by pressing the M button - the flash is automatically triggered and measured. When used without a cable, the meter will wait up to 45 seconds for you to trigger the flash yourself.

Q: 10. How does the Sixtomat F2 perform in low light environments?

A: It will read any ambient lighting condition and give you a time exposure reading