20 Mistakes we all make when starting out and thereafter.

• Mistakes make while taking the photograph
• Lens not stopped down
• Shutter speed not adjusted
• Dark slide removed before closing the lens
• Holder with exposed film used
• Holder with no film used
• Camera fired with no holder inside
• Dark slide ot removed before exposure
• Dark slide put back the wrong side
• Dark slide not put back
• Rear Dark slide pulled out
• Vignetting due to internal blocking
• Vignetting due to excessive movements
• Vignetting due to compendium shade or filters
• Lack of depth of field
• Poor focusing
• Camera controls unlocked
• Camera shaken by the wind
• Subject shaken by the wind
• Film receiprocity failure
• Filter factor not taken into account
• Bellows factor not taken into account
• Wrong f stop scale eg convertibles
• Change in the light or the subject not taken into account
• Cable release / shade showing
• Mysterious double image with long exposures
• Pre and post exposure mistakes
• Film loaded backward
• Film misloaded
• Dust on the film
• Forgot something important at home
• Darslide accidently opened
• Wrong development eg Colour for B&W, or +1 instead of -1 development
• Turning on lights before closing film / paper boxes
• Defective equipment
• Light leaks in in Camera or bellows
• Light leaks in holders
• Ground glass mis-alignment
• Film plane mis-aligned in holders
• Erratic shutter

For more info:

www.largeformatphotography.info/mistakes.html#16