Any advice on teleconverters or teleside converters.

[Energize]

I'm looking to purchase some teleconverters to give me some extra flexibility for my lens collection, on a Nikon D7000. Maybe a 1.4x and a 2.0x, obviously the 2.0x would be impractical for a 70-300mm but a 1.4x may be doable, 2.0x I could use with my primes.

I would then effectively have a 35mm f/1.8, 50mm f/1.4, 70mm f/2, 85mm f/1.8, 120mm f/2.5, 170mm f/3.5, maybe possibly a 240mm f/5 with stacking. And then a 70-300mm f/4.5-5.6 and 100-420mm f/6.3-8.

Which brands are suitable for my Nikon lenses?

On a somewhat related note, are there no reverse teleconverters available for aps-c cameras like there are for m4/3?

 

[Energize]

Yeah Nikon's won't, but other 3rd party ones will so I'm told.

 

[Energize]

I don't think it can be done as APS-C cameras have the same lens-flange to sensor distance as FX which allows FX lenses to be used without adapters. m4/3 bodies are slimmer as there's no mirror box so there's some space available for the adapter.

In answer to your original question - I think Kenko/Tele-Plus is the only worthwhile make that will fit. Make sure you buy a variant of the Pro 300 to get decent optical quality. Sigma teleconverters are equally good but I think they're restricted to Sigma lenses.

All a teleconverter does is change the size of the image circle though, I don't see why if you can increase the size of the image circle that you can't decrease the size of the image circle on an SLR.

http://www.metabones.com/sony/ef-e-speed-booster

That reverse teleconverter allows you to mount a full frame 50mm f/1.2 cannon lens on an aps-c camera and produces a 54mm f/0.90 image.

I'll check out Kenko thanks.

 

[Energize]

Based on the compatibility charts the Kenko Pro 300 fits all my lenses. The Nikon ones will fit the 70-300 but require modification.

I'm fully familiar with what a teleconverter does, it diverges the light coming from the lens thus increasing the image circle so the sensor effectively crops the image to a greater degree, the area of the image circle doubles for a 1.4tc so the intensity of light decreases by 1 stop.

Yes I realise what use they are designed for, but quite a large number of people use a 1.4tc with the 70-300 and the results are better than cropping based on the pictures I've seen, because the whole sensor is getting the desired light from the lens increasing the captured detail despite any aberrations introduced by the teleconverter.

Aside from that, obviously I will be adding more lenses to my collection in the future which are better suited to tc's.