A Site for Photographers by Photographers

Community > Forums > Nikon > Technique > Trap Focus for D300

Featured Equipment Deals

Olympus OM-D E-M5 First Impressions Review Read More

Olympus OM-D E-M5 First Impressions Review

Josh Root gives his initial thoughts and first impressions of the Olympus OM-D E-M5 micro four-thirds camera.

Latest Equipment Articles

Lensbaby Spark Review Read More

Lensbaby Spark Review

This inexpensive gadget does indeed spark your creativity. Read on to see how.

Latest Learning Articles

26 Creative Photos of Water Drops Read More

26 Creative Photos of Water Drops

These absolutely amazing macro photographs feature a tiny elemental thing that can hold a lot of mystery. Take a moment to enjoy these photographs of water drops.


Trap Focus for D300

Albert Grabber , Jul 02, 2008; 05:13 a.m.

Hi !!!

Anyone who can explain it step by step starting from reset options ... !?

Responses

Joe A , Jul 02, 2008; 10:13 a.m.

See page 271 in your Owner's Manual under "a5, AF Activation". Set it to "AF-ON Only" and the shutter button's half-press will be disabled and you use the AF-ON button to focus.

Lex Jenkins , Jul 02, 2008; 08:44 p.m.

Dunno 'bout the D300 specifically but the usual method for trap focus is as Joe described it.

Assign autofocus to AF-ON only, not the shutter release button.

Prefocus on the desired zone or distance.

Press shutter release and wait.

Depending on your camera there are other tricks. For example, with the D2H's built-in intervalometer, I can set it to check conditions at predetermined intervals and if there is a subject within the focus trap zone, it will take a photo. Frankly, it's an awkward and mostly unsatisfactory method. After the timer expires I'm out of luck. If I set the timer to extend the maximum useful period, I'm stuck with a limited number of samples. If an object enters the trap zone between samples, no photo.

Some older 35mm SLRs from over a decade ago, such as a Pentax model, had a far superior system. It could be set to trigger the camera whenever an object entered the focus trap zone. I'm disappointed that Nikon's high end pro dSLRs don't have this built in. It shouldn't be necessary to use any additional device or tricks.

Personally, I find trap focus AF useful with the D2H only with handheld macrophotography. I prefocus on the desired zone and the shutter trips only when the desired area is in perfect focus. But this works only with AF or AF-S lenses, so I can't use it with my 55/3.5 Micro Nikkor.

Albert Grabber , Jan 14, 2010; 10:05 a.m.

TNX - It works !!

Back to top

Notify me of Responses