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04-28-2013, 12:22 PM   #1
Pentaxian




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Vivitar TLA-1 telescope adapter for PK

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Item for Sale
Vivitar TLA-1 telescope adapter for PK

Asking Price
50 USD

Item Location
Denver, CO (United States)

Item Description
Vivitar TLA-1 telescopic lens adapter for PK mount.

Nifty adapter that turns Pentax lenses into telescopes / spotting scopes. ONLY GOOD FOR LENSES WITH AN APERTURE RING. It does not engage the aperture lever, and so you must use on lenses with an aperture ring or else they will be stopped all the way down and it will be too dark to see anything. Probably not the greatest for AF lenses even if they do have an aperture ring because you need to manually focus and many AF lenses have poor grips for manual focus.

Magnification is pretty high -- turns a 50mm lens into a 5x scope, or a 100mm lens into a 10x scope. If you put this thing on a real telephoto lens (greater than 135mm, say) you'll have a tough time looking through it -- might be ok on a tripod. With a slim 50 or pancake 40, you'd have a very compact scope that still has decent magnification.

Dead simple design, just an magnifying eyepiece attached to a bayonet mount. (For some reason no locking button -- it doesn't click-lock onto lens and so just a friction fit on the bayonet. Quite secure though as long as you remember that it is going to come off with a simple twist.)

No adjustments of any kind on the adapter. You focus with the lens, and if needed you can stop down the aperture a bit to increase DoF. (In daylight you can stop down to f/8 or so and still have it be bright enough for viewing.)

View through the eyepiece is clear and undistorted. I think it adds a bit of CA (or makes it more visible), but quality of view will depend mostly on the lens you put it on. Eyecup isn't the greatest as it could stand to be bigger, more light-blocking, more comfortable. But it works. This isn't going to take the place of a good set of binos for comfortable viewing, but if you're walking around with your kit and occasionally need a closer view of something far away, this doesn't take up much space and weighs next to nothing.

Condition of magnifying glass is perfect, no scratches. Minor marks/scratches on plastic body, nothing that affects function. Comes with body cap for bayonet side, snap-case, and original box.

$50 shipped to USA. Payment is to be via PayPal (I pay fees), shipping address must be verified address on your account. Denver locals may buy in-person and pay cash.

(Excuse dust in pics.)







Are you the original owner of the item being sold?
No

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Good

Shipping Destinations
United States

Shipping Charge
free shipping to USA

Shipping Services
USPS 1st class

Accepted Payment Types
PayPal

Return Policy & Additional Details
Let me know if anything wrong within 3 days of delivery and I'll fix it.

Please send me a private message if interested in the item!

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Last edited by vonBaloney; 04-28-2013 at 12:32 PM.
04-30-2013, 09:19 AM   #2
Pentaxian




Join Date: Oct 2011
Location: Savannah, GA
Posts: 5,002
Feedback Score: 63 (100%)
Original Poster
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