Ask Ja­son

Our res­i­dent Nikon ex­pert Ja­son Parnell-Brookes an­swers your ques­tions and solves your prob­lems. If you’d like Ja­son to come to the res­cue re­gard­ing your Nikon-re­lated ques­tion, email it to mail@npho­tomag.com. Please note that we re­serve the right to edi

NPhoto - - Contents - Mark Gniewyk, via email

Ja­son an­swers your queries on ev­ery­thing from se­lect­ing an ISO to buy­ing a new lens

Should I stick with my D7200 and Nikon 10-24mm lens, or up­grade to a Sigma 10-20mm zoom or even buy a D600 with a Tam­ron 15-30mm lens? I want to max­imise depth of field for land­scapes.

Ja­son says... The short an­swer is that if you want big wide-an­gle cover­age with max­i­mum depth of field, stick to your D7200 and Nikon 10-24mm lens. Re­cent re­view sam­ples that we’ve seen of the Sigma 10-20mm aren’t re­ally any sharper. The Sigma’s main ben­e­fit is its con­stant-aper­ture de­sign, which gives you f/3.5 through­out the zoom range. That’s ir­rel­e­vant when you’re try­ing to max­imise depth of field in land­scape shots. The Tam­ron 15-30mm is a su­perb lens, but on a full-frame body you’ll get re­duced depth of field at any ‘ac­tual’ rather than ‘ef­fec­tive’ fo­cal length. Even so, the re­duced depth of field shouldn’t be an is­sue in wide-an­gle shoot­ing un­less the com­po­si­tion in­cludes very close fore­ground ob­jects in the scene, and you want to max­imise sharp­ness from the near fore­ground all the way to the dis­tant hori­zon.

Ul­tra-wide lenses give a phe­nom­e­nal depth of field on DX bod­ies, even at medium aper­tures of around f/8

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