Fixed focal lens or Zoom lens ?

Answered

Florin Barbuceanu

• November 21, 2016 15:28

Hi,

I need to choose between a fixed focal lens and a zoom lens.
Can a zoom lens give reconstruction results as good as a fixed lens ?
Can a reconstruction be made with pictures made at different zoom level ?

Thank you !

• 

  Wishgranter

  • November 21, 2016 16:05

  Hi Florin Barbuceanu
  Yes, you can mix fixed and zoom lenses if you keep basic photogrammetry rules applied..
  and yes, you can get almost the same results, but keep in mind that fixed lenses are superior to zoom lenses regarding MAXIMAL possible sharpness based on physical limitations.
• 

  Florin Barbuceanu

  • November 21, 2016 16:18

  Hi Wishgranter,
  
  Thanks for the info.
  
  If I understood correctly, if I use a zoom lens and I change the zoom level while I scan an object I will still get good results ?
• 

  Wishgranter

  • November 22, 2016 07:45

  Hi Florin Barbuceanu
  Yes, keep good overlap among images and it will be OK, keep in mind that too extensive changes in zoom level result in alignment issues...

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