Da Tiffen:
Q: What is a MC skylight 1A filter? What film is the best used with
this filter?
A: The Tiffen filter that corresponds to the filter you're asking about is the Sky 1-A, a skylight filter that absorbs almost 1/2 of the incoming UV radiateion. This popular filter is pink tinted and gives a touch of added warmth and is helpful when shooting outdoor in open shade or on overcast days. It works with any film but is most effective with slide film.
Q: I am planning a trip to Peru and will visit Machu Picchu. A travel book recommends that I purchase a skylight filter (81B or 81C) to minimize
haze/light problems. I have Skylight 1-A filter on my lens. Do I need to
purchase a new filter (81B or 81C) or will the Skylight 1-A accomplish the
same effect?
A: The Tiffen Skylight 1-A filter absorbs almost half of the UV radiation and is a popular general-use filter that's helpful when shooting outdoors in open shade and on overcast days because it adds a bit of warmth. For your particular application where haze can be more a problem, we suggest that you get a Tiffen Haze-1 filter that absorbs about 3/4 of the incoming UV, and works well where increased atmospheric haze tends to wash out color and reduce image clarity.
Q: I'm looking for a pair of filters for my newly bought Sony DSC-H5
camera. I need a Polarizer and a UV filters. Can you recommend any and what size should I get?
A: ..... So far as a UV filter is concerned, the most popular is the Tiffen UV Protector, which provides basic UV reduction, and the Tiffen Sky 1-A filter that absorbs about 50% of the UV and adds a bit of warmth, which is useful when shooting outdoors in open shade and on overcast days. Either of these can be left on the lens at all times to protect it from physical damage.
Da Hoya (1B):
Due to its light pink color, the Hoya Skylight (1B) reduces the bluish cast of daylight and produces a pleasing, warmer picture tone. Wise initial investments, they help protect your lens from dust, moisture and scratches, which can lead to costly repairs.
Multicoated to minimize reflection at the filter surfaces which reduces flare and ghosting.
If desired they can be left on at all times for protection
Skylight filters provide additional benefits of correction for Ultraviolet(UV) light which can register on film and videotape as a bluish cast and can obscure distant details .Produces more pleasing skin tones in daylight; warmer than a UV filter
Also used to reduce the bluish cast common with some electronic flash units
Da Heliopan (1A):
Due to its light salmon color, the 52mm Skylight (KR 1.5) SH-PMC (Super Multi-Coated) Filter from Heliopan reduces the blue cast of daylight and produces a pleasing, warmer picture tone. Also known as a Skylight (1A) filter, it is a wise investment. It helps protect your lens from dust, moisture and scratches, which can lead to costly repairs. It is also the best available protection against accidental damage to the front element of your lens. A lens that accidentally gets dropped on its front element while hiking can potentially be saved by purchasing this item. Some people refer to it as "cheap insurance". As a lens protector, it should be left on at all times.
The reputation of Schott glass is world renowned. The high production standards combined with a sturdy brass filter ring make this filter hard to beat. It has a "heft" that is impressive. It may feel heavier but the benefit is in the construction and results. Not only is the glass exceptional but so is the seal between the ring and glass. Schott Glass used in the manufacture of this filter is legendary and synonymous with the highest standards of filter production.
The filter ring is made from brass yielding a stronger product. Brass filter rings are also less prone to jamming. In addition, the seal between the glass and filter ring is exceptionally strong giving the filter added strength and durability.
Heliopan has been a leader in the filter industry since 1949. They are known for their high quality and production standards. Their slim mounts facilitate using them with wider angle lenses. Heliopan offers most of their filters with either their standard hard coating or with their industry leading SH-PMC 16 layer multi-coating that transmits over 99.5% of the light striking it on to the image plane for the lowest flare and greatest color saturation.
Nos sites dos fabricantes não tem nada sobre difusão nos 1A.
Amanhã vou fazer os testes a Laser.