- Extreme telephoto range zoom lens- Focal length equivalent to 82.5mm-450mm in the 35mm format- PENTAX(R) SP coating protects exposed lens elements- ED elements compensate for chromatic aberration- Developed specifically for PENTAX(R) digital SLR cameras The versatile Pentax DA 55-300mm zoom lens offers a focal length equivalent of 82.5 to 450mm in the 35mm format, making it ideal for moderate to long sports and wildlife shots. The lens is outfitted with multiple ED glass elements, which are designed to minimize chromatic aberration and makes images look crisper and sharper than ever before. The Pentax Super Protective coating, meanwhile, protects the exposed lens elements against dirt and contamination. Other features include a focusing ring that permits easy manual focusing, a 4.6-foot close focusing distance, and a 58mm filter diameter. Specially adapted for high-quality Pentax and Samsung digital SLR cameras, the lens carries a one-year warranty.
Specifications
- Focal length: 55-300mm
- Maximum aperture: f/4 to 5.8
- Minimum aperture: f/22 to 32
- Lens construction: 12 elements in 8 groups
- Angle of view: 29 to 5.4 degrees (when used with Pentax digital SLR camera body)
- Number of diaphragm blades: 6
- Minimum focusing distance: 4.6 feet
- Maximum magnification: 0.28x
- Filter diameter: 58mm
- Diaphragm control: Fully automatic
- Hood: PH-RBG 58mm
- Objective cap: O-LC58
- Case: S80-160
- Corresponding AF mounts: Pentax and Samsung
- Dimensions: 2.8 inches in diameter and 4.4 inches long
- Weight: 15.5 ounces
- Warranty: 1 year
Pentax DA 55-300mm f/4-5.8 ED Lens for Pentax and Samsung Digital SLR Cameras
List Price: $ 429.95– Price: Too low to display
- Extreme telephoto range zoom lens
- PENTAX SP coating protects the exposed lens elements
- ED elements compensate for chromatic aberration
- Developed specifically for PENTAX digital SLRs
- Focal length equivalent to 82.5mm to 450mm in the 35mm format
Customer Reviews
Review by K. Gittins for Pentax DA 55-300mm f/4-5.8 ED Lens for Pentax and Samsung Digital SLR Cameras
Rating: 
I got this in the hopes of replacing both a Pentax 50-200 and a Sigma 70-300. Luckily, the image quality seems to be an improvement over both, though they were acceptable on their own. This lens is just a bit smaller than the Sigma, though not close to the small size of the 50-200.
The Pentax 55-300 does not have a quasi “macro” mode as do some other xx-300′s including the Sigma, and the closest focusing distance is 4.67ft (1.4m) which is not particularly close, either.
As seems standard with Pentax, the lens hood has a hatch to allow turning a polarizer filter, and the “Quick Focus” ring allows manual focus to fine-tune the auto-focus when the shutter is still half-pressed.
Not particularly a fast focuser, it can hunt in low-contrast situations and when going from very close to very far, or occasionally lock up. The variable f4-5.8 speed is not great for low light but is is OK in most daylight circumstances and helps to keep the cost and size down.
Comes with front and rear caps, a black nylon pouch with no strap or loop, and a manual.
Review by J. Jones for Pentax DA 55-300mm f/4-5.8 ED Lens for Pentax and Samsung Digital SLR Cameras
Rating: 
When I replaced my K100d with the K20d I soon realized I needed better glass than my Tamron 18-250. The Tammy is a great do-it-all lens but just isn’t as sharp as I would like. And the longer the focal length, the softer it gets. Stopping down helps but that makes an already slow lens even slower.
I decided early on that I had to have the Pentax 16-45mm f/4 and the Tamron 28-75mm f/2.8. Great lenses and what I need most of the time but sometimes a guy (or gal or smizmar) needs more reach. After reading lots of reviews, I decided I would be happy with the Pentax 55-300mm f/4-5.8.
Turns out it’s even better than I thought it would be. Comparing shots of a test chart, I can see that it’s not quite as sharp as, say, my 50mm f/1.4 but it’s closer than I thought it would be. Pictures of the real world look plenty sharp with good color and contrast. Even wide open at 300mm. I might stop down when shooting the moon on a tripod but most of the time I leave it wide open.
Speaking of wide open, f4-5.8 doesn’t sound very fast but I’ve found that it stays at f/4 until somewhere past 107mm and f/4.5 until past 190mm. Compared to my 18-250 it’s almost always a full stop faster.
Some people complain about autofocus problems. I’ve had no problems with it. In EXTREMELY low light conditions I’ve seen it take as long as 1.5 seconds to lock on. If this is a problem, stop bitching and find a really expensive lens to suit your needs.
Which brings me to my conclusion. If this lens cost me 0 I would be way more critical. At 5.93 and free shipping from Amazon, I consider this lens to be a steal. But that’s just my arrogant opinion.
Review by Tabulrasa for Pentax DA 55-300mm f/4-5.8 ED Lens for Pentax and Samsung Digital SLR Cameras
Rating:
I share the prejudice expressed by several people who write reviews on this site, namely that the best fixed focal length (a.k.a. “prime”) lenses will always be better than the best zooms. Although I haven’t abandoned that prejudice, this lens, and the Pentax 16-45mm lens, have certainly made me reconsider it. The question that matters, though, is whether the convenience of the zoom outweighs the marginal superiority of prime lenses.
Putting that question aside, this lens is absolutely phenomenal for the price, and is a first-rate lens regardless of price. I think Pentax users have to read a lot of users’ reviews to figure out which lenses are the outstanding performers. On that basis, I bought the 16-45 and this 55-300mm. To make them affordable and reasonably lightweight, the manufacturer has made them relatively slow. Speed is where the prime lens wins. Thus, my complete stable comprises these two zooms, a 50mm f/1.4 (superb!) and my old 85mm f/1.8 — all Pentax.
In conclusion: This lens is a winner. It appears to be better built than the 16-45, very solid with excellent movement of the zooming ring. At first, I thought 300mm was crazy. I never used a lens anywhere near 450mm in the days of 35mm, and I don’t carry a tripod as a rule. But now that I have the lens, I find that in conjunction with the K20D’s excellent anti-shake control, 300mm hand-held at 1/90th and faster is quite useful. Buy it!
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