307 PARTICULATE FILTER - LAVA ROCK POND FILTER

307 PARTICULATE FILTER

ANTI FILTER WEBSITE - ANTI FILTER


ANTI FILTER WEBSITE - FRAM OIL FILTERS CHART - JUNIPER WEB FILTER



Anti Filter Website





anti filter website






    website
  • A location connected to the Internet that maintains one or more pages on the World Wide Web

  • A website (also spelled Web site; officially styled website by the AP Stylebook) is a collection of related web pages, images, videos or other digital assets that are addressed relative to a common Uniform Resource Locator (URL), often consisting of only the domain name, or the IP address, and

  • Alternative spelling of web site

  • web site: a computer connected to the internet that maintains a series of web pages on the World Wide Web; "the Israeli web site was damaged by hostile hackers"





    filter
  • an electrical device that alters the frequency spectrum of signals passing through it

  • A device for suppressing electrical or sound waves of frequencies not required

  • device that removes something from whatever passes through it

  • remove by passing through a filter; "filter out the impurities"

  • A screen, plate, or layer of a substance that absorbs light or other radiation or selectively absorbs some of its components

  • A porous device for removing impurities or solid particles from a liquid or gas passed through it





    anti
  • Opposed to; against

  • not in favor of (an action or proposal etc.)

  • Antaeus in Greek mythology was a giant, the son of Poseidon and Gaia, whose wife was Tinjis. Greeks of the sixth century BCE, who had established colonies along the coast, located him in the interior desert of Libya.

  • a person who is opposed (to an action or policy or practice etc.); "the antis smelled victory after a long battle"











Olympus Zuiko 50-200mm f2.8-3.5 SWD




Olympus Zuiko 50-200mm f2.8-3.5 SWD





High Grade (HG) lens in telephoto zoom range (100mm to 400mm in 35mm terms). It takes 67mm filters. A slide open filter window is located in the underside of its lens hood. Lens hood inside has ridge texture for anti-glare purpose. Signature Olympus blue-and-silver band is present with glossy finish and is ridged in silver band portion. At time of writing, the street price is around $1,000.

Autofocus type is SWD (Supersonic Wave Drive), similar to Canon's USM or Nikon's SWM. It provides quiet and high speed phase detect autofoucs. SWD also features mechanical autofocus. Therefore, instead of Olympus's typical focus-by-wire, you can manual override anytime even when you're on AF modes. It is an internal and floating focus lens. While it does not extend when focus, but it will extend considerably when zoom out (see photo below). Shortest at 50mm and longest at 200mm. Unlike 14-35mm's SWD, Zuiko 50-200mm's SWD is speedy and usually accurate.

All HG and higher grade lenses have standard feature of weather proof and focus distance meter. All metal lens barrel body construction, including lens mount, with fiber glass reinforced plastic coating outside. Made in Japan.

I own this lens so here is my personal opinion on it. This is my favorite lens. $1,000 may sound expensive and it took me some commitment to purchase this lens, but I use it so extensively, it is totally worth the price tag. The photos coming out of this lens is magical: saturated color, high contrast and extremely sharp. If it has constant aperture, it is very possible this may categorize into SHG class of lenses. It is that great.

It is very compact considering it has the reach of 400mm in 35mm term (I have excellent moon shots with it). At first I felt it was really heavy and large (my first lens is Zuiko 14-54mm II, which is very compact), but when compare it with other brands' offerrings, this is very small. Like other Olympus lenses, it is built like a tank, so it's not light weight, but still is lighter than most.

Vignette is well-controlled, but you can observe them in the middle range (around 100-150mm range). For a telephoto lens at this grade, chromatic aberration should not be a problem, so is flare (with hood one) and it is true here. Best focal length I would say is 50mm and 200mm in term of optical quality.

It is super sharp. You can capture small stuff like spider webs which you do not notice with your naked eyes even completely zoom out at 200mm. The bokeh in contrast is very smooth. Light spheres are perfectly round corner to corner. On E-620 both Zuiko 50mm f2 Macro and this lens are about the same in sharpness in most situations (both hit the sensor limit and you cannot get any sharpner), but this lens's bokeh quality wins hand down. 50mm Macro's bokeh is too complex and has green fringes on them. Light spheres are also not round because it does not have circular aperture diaphragm and has seven blades instead of nine blades founded here.

50mm end is good for portrait, but its minimum focus distance of 1.2m (almost 4 feet) means you have to stand far from your subject. I have used 50mm for landscape and it works well. Because of its longish minimum focus distance and you may find yourself limited with flower and mushroom macro, but it is good for insects, birds and wildlife shots that you do not usually shoot very close by because of its sharpness.

Olympus's AF is not its forte. If you want speedy AF, this may not cut it, though it is relatively fast for an Olympus lens. It has no AF limiter so it may hunt a little if lighting is not high contrast enough. I would say this is the only fault of this lens, but since I am a landscape photographer (most of the time), and I usually shoot on a tripod (my handheld skill is terrible), so I manual focus anyways, so this lens suits me quite well.

The best part I like about this lens is people think I am a professional when I shoot with it. It is a very impressive lens for sure. People will come talk to me when I am with it. It adds a tremendous value to my photographic experience. And when the photos come out, the quality will remind you why you spent so much on one glass, because it is totally worth it.

Specification (from Olympus website):

Focal Length: 50-200mm (100-400mm in 35mm equiv.)
Maximum Aperture: f2.8 (50mm) - f3.5 (200mm)
Minimum Aperture: f22
Closest Focusing Distance: 1.2m (3.94 ft)
Dimensions:
Diameter: 86.5mm (3.41 inch)
Length: 157mm (6.18 inch)
Weight: 995g (35.1 oz) without tripod adapter, 1070 g (37.7 oz) with adapter
Filter Size: 67mm
Auto Focus: SWD

Maximum Magnification: 0.21x (0.42x 35mm equiv.)
Lens construction: 16 Elements in 15 Groups. Including 3 ED lenses
Number of Blades: 9 (Circular Aperture Diaphragm)
Angle of View: 24-6.2 degree

Compatible with telephoto converters (EC-14 and EC-20) with AF (single center point AF). Compatible with macro extension tube (EX-25) with MF only.











Olympus Zuiko 14-35mm f2 SWD




Olympus Zuiko 14-35mm f2 SWD





Super High Grade (SHG) lens in standard zoom range. It takes 77mm filters. A filter window is located in the underside of its tulip type lens hood. Lens hood inside is lined with velvet cloth for anti-glare performance and outside is textured to match the camera and the lens body. Signature Olympus blue-and-silver band is present with matte finish. At time of writing, the street price is around $2,300 (I rented this one).

Autofocus type is SWD (Supersonic Wave Drive), similar to Canon's USM or Nikon's SWM. It provides quiet and high speed phase detect autofoucs. SWD also features mechanical autofocus. Therefore, instead of Olympus's typical focus-by-wire, you can manual override anytime even when you're on AF modes. It is an internal and floating focus lens. While it does not extend when focus, but will extend a little bit when zoom or on wide angle and the lens is at its shortest around 22mm.

All HG and higher grade lenses have standard feature of weather proof and focus distance meter. All metal lens barrel body construction, including lens mount, with fiber glass reinforced plastic coating outside. Made in Japan.

Specification (from Olympus website):

Focal Length: 14-35mm (28-70mm in 35mm equiv.)
Maximum Aperture: f2
Minimum Aperture: f22
Closest Focusing Distance: 0.35m (1.15 ft)
Dimensions:
Diameter: 86mm (3.39 inch)
Length: 123mm (4.84 inch)
Weight: 900g (31.7 oz)
Filter Size: 77mm
Auto Focus: SWD

Maximum Magnification: 0.12x (0.24x 35mm equiv.)
Lens construction: 18 Elements in 17 Groups. Including 2 ED, 1 aspherical ED, and 1 aspherical lens
Number of Blades: 9 (Circular Aperture Diaphragm)
Angle of View: 75-34 degree

Compatible with telephoto converters (EC-14 and EC-20) with AF. Not compatible with macro extension tube (EX-25).









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