Never second-guess an ND filter again.

Get the free ND Strengths cheat sheet — stops, optical density, and ND factor on one clear page — when you join my photography mailing list.

Hi there — I’m Samantha Ohlsen, a professional photographer and educator specialising in landscape, travel, and portrait work.

ND filters are one of the most useful tools in a landscape kit — and one of the easiest to mix up on location. This one-page reference puts stops, optical density, and ND factor side by side so you can match what the manufacturer printed on the filter to what you actually need in the field.
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I’ll email you the ND Strengths PDF and add you to my fortnightly photography list. You can unsubscribe anytime. I respect your inbox.

What’s inside the PDF

Your free ND Strengths cheat sheet includes:

  • ND strength in stops (1–10)
  • Matching optical density values
  • Matching ND factor numbers (ND2 through ND1024)
  • A clean, print-friendly layout you can keep in your bag or save on your phone

Built for real shoots — not theory for theory’s sake.

What you’ll get on the list

Join free. Here’s what lands in your inbox:

  • New YouTube videos — practical photography education as soon as each one goes live
  • Extra free content you won’t always see on the channel — tips, checklists, and field-ready notes
  • Coverage across landscape, portrait, and travel photography
  • Roughly once a fortnight — useful, not noisy

No daily spam. No hard sell in every email. Just clear teaching from someone who’s spent years shooting and teaching this craft.

Samantha Ohlsen Photography
Clear, practical education for photographers who want better results — in camera and on location.