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  • Vivitar Auto Focus Teleconverter Lens for Pentax (2X7P)
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Vivitar Auto Focus Teleconverter Lens for Pentax (2X7P)

by Vivitar
34 customer reviews
| 3 answered questions

Currently unavailable.
We don't know when or if this item will be back in stock.
Pentax
  • High Definition
  • Multicoated Optical Glass
  • Increases Focal Length by 2x
Currently unavailable. We don't know when or if this item will be back in stock.

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Style: Pentax
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Technical Details


Product Description

Style: Pentax

7 Element 2X Tele Converter For Pentax

Product Details

Style: Pentax
  • Product Dimensions: 3.5 x 3.2 x 3.2 inches
  • Shipping Weight: 8 ounces
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B003JFQOA8
  • Item model number: 2X7P
  • Average Customer Review: 3.5 out of 5 stars  See all reviews (34 customer reviews)
  • Amazon Best Sellers Rank:
  • Product Warranty: For warranty information about this product, please click here
  • Date first available at Amazon.com: December 19, 2005

Read about our customers' top-rated lenses and cameras on our review pages: Lenses, Digital SLR Cameras, Compact System Cameras

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

36 of 36 people found the following review helpful By NucleusAccumbens789 on March 31, 2011
Style Name: Canon
The solution to this lens is to use manual focus. As per another reviewer, for most autofocus systems to work the aperature must be 6 or greater (that means a number smaller than six). But, a 2x converter adds two f-stops to the aperature (decreases the aperature) so you must have a lens that goes no lower than f/4 for the aperature. Most zoom lenses go to somewhere are 5.3 to even higher numbers and that means that as you zoom in on a subject the autofocus will quit working. The answer is that with a teleconverter expect to use manual focus when using a zoom lens. The lens will work fine.
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11 of 12 people found the following review helpful By Brian J. Rueger on May 23, 2013
Style Name: Nikon Verified Purchase
I was a little reluctant to purchase the 2X converter, but I figured that for the price, I couldn't go wrong. I also knew I could return it if I was not satisfied. So, far I have to say that I'm very happy with the converter. As soon as I received the item I put it on my Nikon D600 (FX) with my Nikkor 80-400mm lens. I place the camera on my tripod looking out my back window waiting for the birds at the bird feeder.

I feel the best way to review this item is with examples. (See my photos for this item.)
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10 of 12 people found the following review helpful By Ralph Brandt on October 16, 2012
Style Name: Nikon Verified Purchase
I do lots of outdoor sports/aviation photography and needed "something bigger." I have a Nikon D80 (semi-retired at age 4 years with over 100,000 shutter cycles) with a pair of Tamrons (28-80 and 70-300) and a Nikon D7000 (about 6 months old) with a Tamron 18-270.

I used the doubler for the first time in real shooting at the Thomasville airport. I am impressed.

The series of pictures with the B-17 coming in and going overhead to landing were taken with the doubler.

[...]
This picture was taken at 44 mm (actually 22 with the lens and the doubler). It shows that with a wide range lens the doubler can be left on in some situations. Please note that I did not have a tripod or other support and a few of the long shot pics have shakes - I have not had time tocull them out. In addition I had the VCC off on the lens, I did not know how they would interact with the doubler. I was using manual focus for this sequence although I did a few shots with auto and it was a little dicey so I turned it off to prevent losing shots. I am using manual more and more as the camera is more responsive.

In all, I am very pleased with the result but like others, if you are not comfortable with the manual focus, this may not be for you or maybe you need to learn the art of manual focus.
[...]
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4 of 4 people found the following review helpful By Silvio Coelho on January 8, 2014
Style Name: Pentax Verified Purchase
It exceeded expectations becaused some reviews stated the teleconverter could not autofocus in all situations. It would not be a problem, I can focus manually. But so far the autofocus is working all the time in my Pentax K-5. Perfect.
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3 of 3 people found the following review helpful By wilson on May 31, 2013
Style Name: Nikon Verified Purchase
I'm a very unhappy customer, first it dosent even mount on my D7100 snug, second when I'm shooting with it some / most of my images are blown out and if your not reviewing every image as you shoot I could end up with a memory card full of blown out images. I used this attached to my 18-300 Nikon lens and when I'm at full or almost full zoom with this teleconverter the images are crap, blurry without detail. Your better of cropping your images, you will have the same quality image if not better than what this product produces. Completely not impressed.
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6 of 7 people found the following review helpful By cameracrazy studio on July 28, 2012
Style Name: Nikon Verified Purchase
Works good with real good light other then that not real good. It does mount nice to my nikon D5100
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2 of 2 people found the following review helpful By T. D. Murray on March 12, 2013
Style Name: Nikon Verified Purchase
My 2X7N (Nikon) was delivered later in the afternoon yesterday...this is what I had happen when I tested it..Nikkor 18-55mm F3.5 G for some reason when you half press the shutter to focus/turn on VR the mirror ( view in the viewfinder jumped )turning the lens clockwise and counter clockwise would SOMETIMES cure this problem..however the focus was ok..verified by NX2 "Focus Point".. i found that if i turned off the VR it stopped (?) ok I really, really didn't buy this for that lens anyway....the lens I bought it for was my Nikkor 55-300mm 3.5 VRII G...now this was a match made in heaven!..Auto Focus is a bit of a challenge at first, you will find that because of the 2 stop decrease in f/stop, you will have trouble focusing in subjects in shade, this is true for all cameras you need to have CONTRAST for the auto focus to work, with your "fully open" f/stop now at f/8 you will need to try to place your focus point on something with bright color and dark color in your focus point...I tried a number of shots in AF-C mode but it's just better to stick with AF-S and pick your focus point..I used half on half off of my subjects eyes and that worked well....in low light...better switch to Manual focus.

I also tried this with a lens that DOESN'T have it's own Auto Focus Motor, and it focused just fine...it sounded like my Ex Wife's 1962 VW Karman Ghia with her trying to find reverse 8^).

I would HIGHLY Recommend this for anybody looking to get some cheap long lens capability

Nikon D90
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3 of 3 people found the following review helpful By Kevin Card on April 2, 2013
Style Name: Canon Verified Purchase
it works well . but it seems to have a little bit of vinuteing at the bottom of the image
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