- This topic is empty.
lens help
-
what is the best for a nikon d40: 2x teleconverter or 2x tele-photo lens? and what is the difference?
A 2x teleconverter can be used on all your lenses double the focal
length (and f stop) so if you have 70mm 2.8 lens it would become
a 140mm 5.6 lens, dont know about a 2x telephoto lens though? could
be it brings the subject 2 times closer than actual???Shutterbug is right about a 2x converter doubling the focal length of any attached lens but it also reduces the aperture by 2 stops, ie. if you were using a shutter speed of 1/500 of a second and you then attach a 2x converter, you will have to reduce you shutter speed to 1/125 to give a correct exposure. So, if you have an 85mm f2 and you attach a converter, it in effect becomes a 170mm f4.
You are also putting an extra few layers of glass between your original lens and your film/sensor in the camera. If there are any imperfections in your original lens then the converter will magnify them.
Converters are good in that they are versatile and will work with all your lenses (usually) but you will generally lose in optical performance over the original lens. They are better used on prime lenses rather than zoom lenses for better performance and more usable aperture brightness. Zoom lenses tend to have a maximum aperture starting from f4+ so if you put a converter on this it becomes an f8+ lens and will be very difficult to focus unless the light levels are good. Forget about using it in something like a concert or low lighting situations.You mentioned a 2x telephoto lens, I’m not sure what exactly you mean by this. Is this something like a 35-70 standard zoom or longer such as in the region of 70-150. Off hand, I can’t think of any medium to long zoom telephoto which has a 2x multiplication. For the D40, I would think that the 55-200mm f4/5.6 would be worth considering. It’s a 4x zoom and the price is moderate depending on whether you go for the standard or VR model. It’s maximum aperture is f4 at the 55mm end and f5.6 at the 200 which is relatively ok and standard enough for this type of lens. With the VR model, you can then use it with a slower than normal shutter speed, which will help.
http://www.europe-nikon.com/product/en_GB/products/broad/1119/overview.html
http://www.berminghamcameras.ie/store/index.php?target=products&product_id=3255
http://www.berminghamcameras.ie/store/index.php?target=products&product_id=3254That eBay link isn’t and endorsement for that supplier, I know nothing about them, but it gives an idea of the price it’s available at elsewhere if you are comfortable dealing on eBay.
As you can see the eBay price for the VR model is more or less the same as the non VR model here, even allowing for the postage.
I don’t know what your budget is but at €200 it’s good value and works fine on the D40.If I was making the choice I would opt for the lens rather than the converter, if your budget is up to it.
David
thanks for help. i already have the 55-200mm af-s lens. i received them yesterday.
and this is what i was telling you about:
http://cgi.ebay.ie/52mm-2-0x-Tele-Photo-Lens-for-Nikon-D40-D40x-D50-D60_W0QQitemZ220365098124QQcmdZViewItemQQptZUK_CamerasPhoto_CameraAccessories_CameraLensesFilters_JN?hash=item220365098124&_trksid=p3286.c0.m14&_trkparms=72%3A1301|66%3A4|65%3A12|39%3A1|240%3A1318chinese, of course.
thanks
The item you were looking at on e-bay is not an actual lens, it is just a
magnifier which attaches to the lens, might be ok for macro but I would
say the quality would be questionable.A lot of money can be wasted on these e-bay “bargains” I would say if
it is ridiculously cheap then steer clear, if you are tempted you can always
ask advice here before buying. You are far better off deciding what type
of photography you want to get into and save for the appropriate lenses.
You must be logged in to reply to this topic.
