Normally, I take pictures as well as I can, and expect to edit appropriately later, regardless of my intent at the time the photo was taken, as Rafael suggests. However, there are often reasons to edit as soon as possible in the field or to otherwise take notes on particular photos as they are taken.

If you wish to edit the images while in the field:

• Some cameras allow limited in-camera editing (such as cropping or changing RAW settings).
• You can edit images on your phone, which would be more portable than tablet or notebook. You can transfer the images using a wireless or USB OTG adapter. – I tend limit such edits to cropping, rotation, and exposure correction. Color correction is reserved for later.

To take notes:

• Some cameras allow audio recordings associated with photos.
• If your camera doesn't allow audio recording, you can record a video instead.
• You can record an audio note on your phone. Don't forget to mention the relevant frame number.

• If you have a portable white board or boogie board, you can write and photograph notes, such as contact info of people to send photos to later. You can have people pose with their contact info so it's clear who's who.

• You can photograph hand signals as reminders.

  • You can show the approximate framing you want with an 'L' shape.
  • You can use sign-language letters.

  • You can indicate numbers from 0-31 by treating each finger on one hand as a binary digit. (With two hands, you can indicate 0-1023, but the camera would need to be on a tripod with timer.)

  • If you use manual lenses, you can photograph the lens before you switch to it. Then you can use a hand signal (such as a number) to indicate zoom level and aperture.

• If your camera has a flip out screen, you can put a sticky note behind it to write brief notes.