Question about Tamron Autofocus 2x Teleconverter Lens for Nikon DSLR Cameras
I use a tamron 70-300 telefoto lens with internal motor for my Nikon D40. I bought a Tamron 2x AFs teleconverter (compatible with D40 as per Tamron if using an "AFs"). My problem is, if I increase the focal lenght near the 300mm mark, I received an error message...Press Shutter release Button Again. But If I use it near the 70mm mark, it seems normal. But sometimes I receive such message.Will it also affect or damage my D40 if I constantly try to use it. Thanks a lot.
When using a TC, as the perceived focal length increases and the aperture falls off, AF struggles to work except in very bright light.
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Posted on Jan 02, 2017
Autofocus function on the D40 only supports lenses with the
AF-S feature, which have an autofocus motor built into the lens,
instead of using an autofocus motor drive built into the camera.
The Tamron lens you have, does not have a built in motor and
the autofocus function relies on the motor drive in the camera.
It will not work with the D40 or D60, but it will work with other
Nikon digital SLRs, such as the D80. Need to get an AF-S
type lens or upgrade to different Nikon digital SLR. Unless
you do this, you will have to manually focus the Tamron lens.
All of the Nikon DX (for digital) series lenses are also AF-S
type, so they will work with the D40, which is designed as
an entry level digital SLR, therefore it is intended primarily
for use with DX lenses, which are typically sold in a kit with
the D40. Most common one is Nikkor 18-55mm DX AF-S.
Other Nikon AF-S lenses made for film cameras (FX type)
will also work with the D40, but these tend to be expensive
professional models. DX series lenses tend to be more
affordable. You might consider the 18-200mm DX AF-S
as an alternative to the Tamron, but these are not cheap.
Posted on Jul 05, 2008
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.
Posted on Jan 15, 2009
That 2x is not AF-s compatible. It is the older Af style which the d40 does not support. Your camera store should have known this when they sold it to you, unless you bought it mailorder. Then see if they will let you return or exchange it.
Posted on Nov 08, 2009
The adapter will work if it is for the Nikon cameras Be aware you loose two stops and it makes the lens twice as long, so you need lots of light, to shoot at F5.6 (full open) and 1/400 of a second. when zoomed in. Your lens does not have image stabilisation.
Posted on Jan 25, 2014
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