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Pentair Triton II Side Mount Sand Filter - 63 GPM, 3.14 Sq. Ft.

The Pentair Triton II side mount sand filters are well known for leading the pool supply world in originating the standard for effectiveness, efficiency, quality, and providing years of reliable, low maintenance operation. The Triton II swimming pool filters sand bed level, generates an even water flow creating the most efficient filtration possible with crystal clear results.This swimming pool sand filters GlasLok process is made up of a 1-piece, fiberglass reinforced tank with a UV-resistant coating for years of reliability, corrosion-resistantance, and performance. This innovative method seals in the fiberglass, preventing fibers from growing, under severe conditions into the sand filter. Pentair's swimming pool filter sand flow system controls filtration, quality, and ensures maximum run times between backwashing, to save time.

Nikon D300, Nikon 75-150mm f/3.5 series E zoom

A lens test, original size is 1:1 pixel resolution (no resizing, only cropped)

This lens is an old gem. Handling is quirky -- it is a one touch, push-pull to zoom, twist to focus. Manual focus. Pretty darn good performance considering what I paid for it: $49 down at K and S. To top it off, constant aperture throughout the zoom range. A great piece of kit for risky locations; if it happens to get damaged by salt water or sand, it won't break the piggy bank.

Pros:
- sharp when stopped down (f/8 and f/11)
- cheap
- decent build, metal barrel and lens mount.
- incredible bang for the buck
- full frame
- compact
- constant aperture

Cons:
- suffers from zoom creep
- hard to keep focus locked between shots
- longish barrel but no tripod mount

Other:
- AIS
- takes 52mm filters, like most other AI/AIS lenses of this era.
- comes in two versions, one with a silver ring above the aperture ring, the other with a black plastic ring. The sample used to take this image has the black plastic ring.
- works best on camera bodies that can read the mechanical aperture setting (D200+)
- works very well with PK-13 extension tube

Alternatives:
- The modern Nikkor 55-200mm 1:4-5.6 VR has a wider range, and is also very capable. On the plus sides, it has autofocus and vibration reduction. On the negative sides, build quality is plastic, including the lens mount, and aperture is not constant.

Elsewhere I have older photos of Mount Hood from within the state of Oregon (the volcano is located in Oregon). Here we are on the north side of the Mighty Columbia River, overlooking Wishram, Washington. Mt. Hood is about 40 miles away to the southwest as the crow flies. In the "pictures don't lie" department, yes, Virginia, they do. The actual conditions when this picture was made were, let's say not good. The atmospherics were icky. When we first saw the mountain, we no-kidding thought it was just a big WADOT sand pile it was so putrid yellow! I don't have a polarizer (the P&S cameras can't accept screw-on filters anyway and I hate shooting one-handed), and I wasn't sure if a polarizer would have helped (my sunglasses didn't) but I knew from experience that a single keystroke in PhotoShop would clean up the haze as if it was never there. And it did. Pictures do so lie.

Triton® II Side Mount Sand Filter is the original and still the industry standard. The patented GlasLok™ process creates a one-piece, fiberglass reinforced tank with UV resistant surface finish for years of unequaled strength and durability. This unique method locks in fiberglass, preventing fibers from "blooming" under harsh conditions. Features: Heavy-duty closure provides easy inspection, and features an easy-to-read pressure gauge with air relief valve Swing-away diffuser allows instant access to sand and all internal parts All internal parts are threaded for ease of service Internal air bleed Bulkhead connectors are threaded for easy installation and service Combination sand and water drain makes servicing and winterizing fast and easy Maximum Operating Pressure 50 psi