"Fundamental properties" of the Nikon D100 which must be known to a photographer, technical characteristics:
23.7*15.6 mm CCD 3008*2000, 12bit data transfer, 7.8 micron pixel pitch, GRGB filters. sRGB and AdobeRGB color spaces.
The buffer allows for up to 7 shots (4 RAW) at 3 fps with indication of possible quality in course of shooting.
Noise elimination mode, starts approximately from 1/2 s and longer exposures.
Body design - Nikon F80.
Bayonet mount - Nikon F, magnification factor x1.5.
Lenses compatibility: AF Nikkor D/G all modes; in certain modes: MF Nikkor D, AF Nikkor, AI-P Nikkor. In Non-CPU [A] or [M] mode with center-weighted or spot metering; the electronic rangefinder with maximum aperture of f/5.6.
File format: JPEG, TIFF, NEF (RAW) 12-bit, NEF compressed, L (3.008 x 2.000); M (2.240 x 1.488), S (1.504 x 1.000).
Removable memory: CompactFlash I/II, Microdrive.
Sensitivity: 200 - 1600, HI1 (3200), HI2 (6400).
Focusing: TTL phase detection (Nikon Multi-CAM900 autofocus module, distance range -1 EV to +19 EV at ISO 100), 5 zones of manual or auto selection (dynamic focusing), Single Servo AF, Continuous Servo AF, Manual focus, focus lock.
TTL exposure metering with open aperture, modes: 3D Matrix Metering with 10-segment SPD, Centre-Weighted Metering, Spot Metering, 30 - 1/4000 sec exposure, manual, in 1/3 or 1/2 steps.
LCD 1.8", 118000 with LED backlighting.
TTL optical viewfinder, 95%, with dioptre adjustment (-2 to +1 D), external focus point 20 mm, B-type Bright View Clear Matte II screen II, magnification - 0.8X for f=50 mm.
Viewfinder information: Focus indications, Metering system, AE lock, Shutter speed, Aperture value, Exposure/Exposure compensation indicator, Exposure mode, Flash output level compensation, Exposure compensation, Number of exposures remaining
Flash: D-TTL (Automatic Balanced Fill-Flash controlled by five-segment TTL Multi Sensor) for built-in and external flashes. Sync modes: Front-Curtain, Rear-Curtain, Red-Eye Reduction, Slow Sync, up to 1/180s.
Built-in flash, guide number (ISO 100): 12; Optional sync terminal adapter AS-15.
Interface: USB1.1, Video NTSC/PAL.
Power supply: Li-Ion EN-EL3 battery (7.2V 1400 mAh), AC adapter EH-5.
Accessories: Multi-Function Battery Pack MB-D100, Charger MH-18/19, AC Adapter EH-5, Remote Control.
Dimensions/Weight: 144 x 116 x 80.5 mm / 700 g.
Noise and sensitivity
Sensitivity can be changed in a wide range: from 200 to 1600 "plus two 1/3 steps". But if you look at the shots made with different sensitivity settings you will see that brightness, with ISO increased by 1/3, changes regularly: "dark-normal-light-dark-..." frame. If you look through EXIF data for a series of shots with ISO increasing by 1/3 for each shot you will see that the exposure step (exposure / aperture) actually can be 0, and only the exposure error can be changed by approx. 0.6 EV. We can say that this small and "precise" ISO step of 1/3 means shooting with a small error, and the actual step is 1. For shots with equal exposure errors (step 1) twice higher ISO corresponds to twice lower exposure.
Below is a series of fragments 1:1 with the gamma increased in the Photoshop.
The shots of the D100 in Windows applications require a higher gamma, which
can be explained both by orientation toward an alternative system and by
a "desire" to delivery details in highs. Since the exposure error didn't
correspond to the series in case of sensitivity of HI1 and HI2 (all had
-0.3EV), the gamma correction for the HI was fulfilled to make the image
equivalent in brightness. Besides, we made two shots for each of these
"record" ISO values - in the auto exposure mode and in the manual one,
twice and 4 times lower than the exposure of a frame with ISO 1600. All
non-HI ISO values have an acceptable noise level, while 3200 and 6400 should
be used only when they are really needed. The noise reduction works with
exposures longer than 1/2 s.
Sergei Sherbakov (firstname.lastname@example.org)
Write a comment below. No registration needed!
Copyright © Byrds Research & Publishing, Ltd., 1997–2011. All rights reserved.