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As advised I will try both my zoom and fixed 50m lenses at 70m equivalent and at various f stops and see which results I prefer before giving any thought to a new lens.

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In absolute terms and certainly at anything around f5.6 or less I would very much expect the 50mm to be superior. At normal print sizes once the 18-70 is closed down by a stop or two there may not be that much critical difference.

As I said in this reply to another thread you can use almost any lens for portrait work as long as you know what you are trying to achieve. Some 'togs would never use anything other than an 85mm (on film) while others swore by 100 or even 135mm lenses and I believe 200mm was not unpopular. A lot depends on the 'tog, the subject and the relationship between them. If a subject is made uncomfortable by the proximity of a photographer using a short telephoto like the 85mm then a better result may well be achieved with a 135 or even longer. IMO there's probably no 'right' lens for portraits - only the right lens for the situation...

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Nigel

Completely BSRIPN

ElSid Gallery

A camera in the hand is more fun than one in the cupboard........

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