I just receved my Tiffen 2X teleconvertor telephoto lens add on for my 850Z. The camera looks pretty cool with this lens screwed onto it. The pictures look very good also. Frankly, I am surprised. I thought the camera would have a problem with the image quality. I guess Tiffen and Epson worked on this and it came out right.
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Re: Tiffen 2X teleconvertor telephoto lens
I was testing the new Kenko 2x teleconverter I just got. Seems to work, but only at full zoom. But I left the epson supplied adapter ring on when I turned the camera off, and it interferred with the lens cover, and jammed it. It's a 4 leaf shutter assembly, and mine is screwed up so it won't open or close. Needless to say I'm kind of unhappy. I've heard Epson service is good, guess I'm about to find out.
If you use the adapter, take it off when you turn the camera on or off!
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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.
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.
It's a cheap(ish) generic screw on lens multiplier and so compatibility with anything it's screwed onto is a matter of pot-luck, especially as the conversion factor is so high.
There is nothing you can do, other than to try alternative brands (preferably not exceeding 1.4x) or to obtain the expensive Panasonic version which is designed to be compatible with your camera. Even the official product will produce some distortion (usually barrel distortion) and most likely a fair bit of chromatic aberration. It's just usually less adverse than with the generic products.
Hi, I have a Minolta 7D. I bought an M42 screw lens adapter, an almost flat plate, however the camera kept saying "no lens detected". Then somewher on the web I found a solution: On the menue screen I found "Shutter Lock" with the choice On or Off. By switching to off I can now use 42mm lenses. Though there is no AF and the metering works with setting the aperture manually. Good luck and maybe you find the Sony to be the same. Roy Smith
There are lenses available to add with an adapter ring. I have the wide angle lens (which I LOVE) and a 2x telephoto lens. The wide angle lens allows me to macro from several feet away. It is an amazing lens. The telephoto lens is something you really need to use with a tripod. But yes, there are lenses you can add to your camera.
When shooting in macro to get good depth of field you often have to shoot f/22. This does not let much light in. You have to hold the camera and subject tight. Meaning the use of a firm tripod is not optional. In most cases you need a longer exposure so wiggle is very important.
With the telephote lens, I am assuming that the camera is a bit more sensitive to any form of camera shake. My suggestion, when using the telephoto lens, is to manually set the shutter speed to its fastest setting (that, or set it to "sports mode"). Also, experiment with the telephote lens using your tripod. Set the camera up on a table and use the timer so that the camera will snap the image automatically. See if the picture is still blurry. If you don't have a tripod, just place it flat on the table.