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Sakar 2x doubler on Nikon vc lens

Can you use a Sakar MC 2X n/afs lens on a vibration control lens?
Will you have full function?

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SOURCE: AF problem with Quantaray 2X adapter

I believe a tele will not work with auto focus when the lens is f4 or larger at the smallest end.

Posted on Jun 24, 2008

  • 73 Answers

SOURCE: Can you tell me the Pros and Cons of using a Bower

A 2X adapter is an item attached between your lens and camera body. It's AF (which is good) and N (most likely a Nikon).
They make what ever zoom lens 2X the focal length. So a 135mm becomes a 270mm. So you get a bigger tele lens. They add extra glass, so the image is not as good without it, they eat up an F/stop. So outdoors in bright sunlight, no problem. It's shady and you have ASA 200 and you are going to have a slow shutter speed that can cause blur. Plus the viewfinder gets darker due to the extra glass. So in dim light, it may not AF and be hard to manual focus.

Posted on Jul 27, 2009

  • 98756 Answers

SOURCE: quantaray 2x AF for Nikon

A 2x tele-extender will rob you of two stops of light. This is simply a matter of physics: you're looking at only one quarter of the scene, so you'll only get one quarter of the light.

You specified neither the camera body you're using nor the lens you're using the tele-extender with. Most Nikon bodies will not autofocus with lenses slower than F/5.6. (Actually, they might, but F/5.6 is what Nikon specifies.) With the two-step penalty, a lens would have to be F/2.8 or faster in order to autofocus.

The solution is to either get a faster lens ($2000 or so) or to switch off the autofocus and go manual.

Posted on Feb 05, 2010

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1 Answer

What is T Mount Telephoto Zoom Lens with 2x Teleconverter


The T-mount is a universal thread developed by Tamron which allows various adapters to couple a lens to a wide variety of camera brands. If a lens is listed as having a T-mount, it means that the lens can be coupled to your camera if you have a T-mount adapter for your camera.

A 2X teleconverter (often called a doubler) enables a lens of a specific to be doubled. For example, the lens referenced above actually is a 650-1300 lens but with the 2X teleconverter the focal length can be doubled to a maximum focal length of 2600.

I have an Opteka 600-1200 telephoto lens which I consider to be a decent lens for its very low price. I also have a doubler which came with my camera kit. That means I can increase the focal length of my lens to 2400 but I cannot imagine any reason to do so. At it's full zoom 1200mm focal length, this lens is very difficult to handle and must be used on a tripod with a remote shutter release.

It is extremely time consuming to focus and must be focused very accurately because it has almost no depth of field. At 1200 mm, the slightest breeze or vibration will cause the picture to go fuzzy from movement.

The lens is also large and does not fit conveniently in a camera bag so it rarely goes with me unless I know for sure that I will need it. It is not particularly good for sports action shots because the action will be over before you are ready to shoot the picture. With very bright light (such as the mid-day sun) and pre-planning and pre-focusing you might be able to get some interesting sports action shots. Say you're at an automobile race and you know a car will be coming into view at a certain spot, you can set up for that spot then trip the shutter when the car pops into view.

All that being said, I think this is a good lens to have in my bag without spending $10,000 plus for a really good lens of this size.

Feb 08, 2013 | Opteka 650-2600mm High Definition...

1 Answer

How do i attach the my zeikos 52mm HD Dslr MC AF 2x telephoto lens to my nikon d90?


You don't. The Zeikos attaches to the front of lens with a 52mm filter thread, which then attaches to the D90. If you have the 18-55mm lens, for example, this will fit onto the front of that lens, effectively converting it to a 36-110mm lens. If you have the 18-105mm lens, this won't fit onto it.
This device is really intended for use with cameras that don't have interchangeable lenses. With your D90, you're much better off using another lens instead of putting this onto the front of another lens.

Feb 13, 2012 | Zeikos ZE2X52B 52mm 2X Telephoto Lens

1 Answer

I did not get any instructions with my Opteka. Have tried to take photos with it. But they came out all blank. I used a tripod. Would like to know where I can down load instructions. Certainly not as good...


You did not provide enough information to determine what your problem is. For example, were the pictures all light or all dark. Knowing this lens, I will assume that they were all dark. So...

1) This is a very, very slow manual-focus lens. It will not auto focus. It must be manually focused very precisely because it has virtually no depth of field.
2) Depending on your camera, your internal light meter may not work. On my camera (Nikon D-90), it does. If it does not on yours and I suspect that may be your problem, you're going to have to shoot everything manually, i.e. setting the shutter speed and lens opening yourself. You can use your internal light meter to help you get started by taking your light reading before you install the lens...preferably using the aperture only setting where you set the aperture at f8 which I think is the speed of the Opteka and let the camera set the shutter speed. Make a note of the shutter speed then attach the Opteka to the camera and mount the lens on a tripod with the camera attached.
Then set your camera mode to manual and set the aperture to match the lens (f8, I think). Set the shutter speed at the speed you noted earlier. Shoot a picture using a remote shutter release or the self timer. This lens is so slow that unless you're in exceptionally bright conditions you will get fuzzy pictures due to camera movement at full zoom of 1200m and above if you're using the 2X doubler. I would start shooting at minimum zoom of 650 without the 2X doubler. Shoot a picture. and check the result.

You should have an image but it may be too light or too dark.

If its too light you'll need to increase the shutter speed or stop down the aperture to, say, f11...or both. Make the adjustment and shoot another picture. Remember that if you increase the aperture, you increase your depth of field, making focus less critical. If you increase the shutter speed you make camera or subject movement less critical.

If it's too dark, you can only increase the shutter speed because you can't open the lens any wider than f8. Make the adjustment and shoot the picture.

Keep doing this until the pictures are the way you want them.

This is a decent lens for the price and worth the little money they cost if you can't afford $10,000 plus for a high quality telephoto lens of this size. I would forget about the 2X doubler because as others have said, it further reduces the speed of an already very slow lens with such a high rate of magnification that a knat landing on the lens could cause the picture to blur from movement.

Jun 26, 2011 | Opteka 650-2600mm High Definition...

2 Answers

I have seen a add for Opteka 650-2600mm High Definition Telephoto Lens for Canon but if we see a price of the lens it seems to be too low. I am consuffed whether the lens is good or it is just a marketing...


It is an inexpensive lens. It's actually a 650-1300mm lens with a 2x tele-extender to take it out to 2600mm. It's slow, manual focus, without any form of image stabilization, and with no electronics so setting the exposure is also manual. It won't be as sharp as a Canon 600mm lens, for example, but it is a lot cheaper. Also bear in mind that the 2x tele-extender will cost an additional 2 stops of exposure, so with it attached the the already slow lens becomes a very slow lens, giving a very dark view through the viewfinder.

Nov 24, 2010 | Opteka 650-2600mm High Definition...

1 Answer

Can you tell me the Pros and Cons of using a Bower MC 2X N/AF. I am not an expert in using lens and Photography so Please make it simple.


A 2X adapter is an item attached between your lens and camera body. It's AF (which is good) and N (most likely a Nikon).
They make what ever zoom lens 2X the focal length. So a 135mm becomes a 270mm. So you get a bigger tele lens. They add extra glass, so the image is not as good without it, they eat up an F/stop. So outdoors in bright sunlight, no problem. It's shady and you have ASA 200 and you are going to have a slow shutter speed that can cause blur. Plus the viewfinder gets darker due to the extra glass. So in dim light, it may not AF and be hard to manual focus.

Jul 06, 2009 | Cameras

1 Answer

Can I use a Kenko Lens with a Nikon D60?


If it's an AF teleconverter you will be able to use it and get proper exposure from the camera, but it will not autofocus with the D60. The D60 requires AF-S lenses and teleconverters for autofocus.

Mar 01, 2009 | Kenko MC-4 DG for Nikon AF 2x (MC4AFNDG)...

1 Answer

Tele converter option for Tamron 28-75mm f2.8


This is a lens for Sony/Minolta cameras. It is not compatible with the Nikon D90. Hence a Teleconverter for Nikon will not work on this lens to mount it to a Nikon D90.

Jan 15, 2009 | Tamron AF 28-75mm f/2.8 XR Di Autofocus...

1 Answer

Quantaray 2x AF for Nikon


A 2x tele-extender will rob you of two stops of light. This is simply a matter of physics: you're looking at only one quarter of the scene, so you'll only get one quarter of the light.

You specified neither the camera body you're using nor the lens you're using the tele-extender with. Most Nikon bodies will not autofocus with lenses slower than F/5.6. (Actually, they might, but F/5.6 is what Nikon specifies.) With the two-step penalty, a lens would have to be F/2.8 or faster in order to autofocus.

The solution is to either get a faster lens ($2000 or so) or to switch off the autofocus and go manual.

May 11, 2008 | Quantaray (261660245) for Nikon AF Lens...

2 Answers

AF problem with Quantaray 2X adapter


How does it stop working? Do you mean it doesn't auto focus anymore?
Many longer focal length lenses wont auto focus with 2x teleconverters on them.

Nov 27, 2007 | Quantaray 100-300mm F4.5-6.7 Zoom lens for...

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