Flash: Internal Or External?
Source: Tom's Guide US | Keywords: canon, digital, rebel, xt
- 1. Introduction
- 2. Small, Or Too Small?
- 3. Small, Or Too Small?, Continued
- 4. Overall Design
- 5. Focusing
- 6. Exposure
- 7. Shooting
- 8. Canon 350D Menus
- 9. Nikon D70s Menus
- 10. Nikon D70s Menus, Continued
- 11. Flash: Internal Or External?
- 12. Flash: Internal Or External?, Continued
- 13. Drive, He Said
- 14. Drive, He Said, Continued
- 15. File Storage
- 16. View And Review
- 17. View And Review, Continued
- 18. Lenses: Not Really Comparable
- 19. Lens Availability: Plenty To Choose From
- 20. Connections And Software
- 21. Connections And Software, Continued
- 22. Connections And Software, Continued
- 23. Connections And Software, Continued
- 24. In Practice
- 25. Canon EOS350D
- 26. Nikon D70s
- 27. Noise & Sensitivity
- 28. Noise & Sensitivity, Continued
- 29. Conclusions
11. Flash: Internal Or External?

Both models are equipped with a built-in flash with TTL metering, located on the viewfinder prism. It pops up either manually (by pressing a little button to the left of the prism) or automatically in the "foolproof" shooting modes. With both models, the guide number is a little above 10 (at ISO 100,) which is obviously quite modest. The maximum range will depend on the lens aperture and the sensitivity level you've chosen; using a reasonable value of ISO 800, the range will be around 32 feet (10 m) at an aperture of f/4. But you won't get far beyond 7 feet (2 m) with the standard zoom lens in telephoto position at ISO 200.
Another issue is that since the flash isn't very far off the lens axis, if you are shooting a close subject, a fairly large lens can quickly become an obstacle to the light and create a shadow in part of your shot. We advise you to take test shots to see what works with your lens and chosen focal length! Sometimes removing the lens hood is enough to improve the situation.
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