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Topics - Plainsman

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Third Party Manufacturers / Tamron distance
« on: December 12, 2014, 05:15:25 AM »
Just done an image size check of the moon this morning at 600 and the same at 400 on both Canon 100-400 and the 400/5.6.

Image size for the Canons was the same but the Tamron was almost exactly 1.50 times bigger i.e. with the Tamron at distance (say beyond 100m) you get the full 600mm. Obviously this falls dramatically with multi element zooms as your operating distance gets down towards close focus.

Brian Carnahan quotes a figure of 570mm but does not say what the calibration distance was.

Lenses / World Cup started - no sign of 100-400L Mk2
« on: June 14, 2014, 10:14:25 AM »
Never had much credence in the views held by some that this mythical lens might appear in Rio - but still early days etc. Miracles could happen.

Ultra secretive Canon treat their loyal expectant customers with contempt.

The least that the Canon hermit kingdom people could say is no replacement planned at all or replacement planned for 2015, 2016....2020 or whatever.

Can anyone advise on a suitable type (ie NOT the prism right angle type that Canon make)?

Any recommendations for the ones on ebay?

Magnification of 1.3 to 1.5X would be fine.

Nikon make a good one but doubtful whether it would fit Canon.

Thanks in advance for any replies.

Third Party Manufacturers / New Nikon 300/4 VR II on the way.......soon?
« on: October 13, 2013, 06:25:48 AM »
The current 300/4 non VR lens is by all accounts very sharp - even wide open.

This new prime will likely to be even sharper and lighter and could be a real stunner especially with D7100 type high res Nikon's bodies.

And with a new 1.4xTC also coming along you have the potential of a very nice 420/5.6 VR II as well. Canon - where are you?

Third Party Manufacturers / Sony 400/4 telephoto on the way....
« on: May 03, 2013, 08:30:20 AM »
..details from SonyAlpha rumours.

Said to be "affordable for amateurs".

Absolutely no sign of a new 400/4 coming from Canon ie a scaled up version of the superlative 300/2.8 II would be just fine - very little R&D required!. With slightly smaller aperture it would be slightly lighter and approx same price.

A very sharp 400/4 weighing at about 2.5Kg would be a best seller for Canon IMO.

Funny why Nikon haven't thought of making one for their new high res cameras.

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