WS10 Examples reach

Foto at top: Holland cloudy black-necked Grebe (Geoorde fuut) size 30cm distance 35m equivalent 1050mm D500 NIkkor 500mm f/5.6E PF VR standard camouflage APERTURE mode Birds 1/1000 f/8 ISO 2000 -1/5EV. @dik chk

Extra Info: F11 full screen

@dik Tis page is yet maintenance mode through 28 febr 2024 (chk all exmpls yet )

At this page we will review examples using our reach-formula (in Reach) demonstrating the effect of varying size and distance of the subject bird, the amount, direction and type of available light and air and atmosphere and the quality of detail in bird pictures.

Example 1 using cropping level 2700 x 1800

Holland Nov 2023 **Beautiful Toendrarietgans (Anser Fabalis)** breeding North Siberia, **size 85cm distance 40m equivalent 1050mm** partially cloudy Z50 Nikkor 500mm PF VR f/5.6E standard camouflage. **Crop 2700 x 1800**.

@dik CHECK YET: Reach = (85/17 x 30/35x 1500/1050)² % => 0.0 amount detail benchmark picture => height bird image around 0,55x 33% = height bird image => around 80% detail total picture.

In this example the large equivalent and size bird make up for the quite large distance.

Example 2 using cropping level 2100 x 1400

kingfisher — Holland May 2019 Kingfisher (IJsvogel) **direct sunlight** **size 17cm distance 40m equivalent 1500mm** Z7 Nikkor 500mm f/5.6E PF VR substantial camouflage 1/3000 f/11 ISO 500 -1.0EV. Bird looks up at nest, wife breeding. Notice the characteristic black wingtops. **Crop 2100 x 1400**.

Reach = (17/17 x 30/33 x 1500/1050)² % => 0.55 amount detail benchmark picture => height bird image around 0,55x 33% = height bird image=> around 80% detail total picture.

The large equivalent makes up for the larger distance.

Example 3 using cropping level 3000 x 2000

buzzard — *Holland 2019 sun Buzzard (Buizerd) **size 54cm distance 45m equivalent 1050mm** sun D500 Nikkor 500mm f/5.6E VR equivalent 1050mm standard camouflage 1/4000 f/8 ISO 400 -1.5EV .* *This picture clearly shows the fine quality of this 500mm telelens.* **Crop 3000 x 2000**

Reach = (54/17 x 30/40 x 1050/1050)² x (2100/3000)² x 100% =>2.5 amount detail benchmark picture = 250/3 => 85% detail benchmark picture

The width of bird-image-area of the flying bird is about 1.5 times the height of the bird-image-area of the benchmark picture (33%) according to the reach-formula including the crop level correction factor.

Example 4 using cropping level 3900 x 2600

great white heron — Holland sept 2023 Great White Heron (Grote Zilverreiger) **size 90cm distance 60m (!) equivalent 750mm** standard camouflage APERTURE Mode Birds Action 1/3000 f/5.6 ISO 100 -1.0EV. Splendid detail, light contrast and colour contrast at 60m using Nikkor 500mm f/5.6E PF VR TC-14E III. *By the way this picture once more shows the top quality of the 500mm Phase Fresnel telelens.* **Crop 3900 x 2600**.

Reach = (90/17 x 30/60 x 750/1050)² x (2100/3900)² x 100% => 100 % detail benchmark picture.

The bird-image-area (with upright White Heron body 90cm excluding long neck) has about same size as height Kingfisher in bird-image-area benchmark picture.

Example 5 using cropping level 2700 x 1800

bearded tit — Holland Bearded Tit (Baardman) juvenile cloudy **size 13cm distance 10m equivalent 600mm** D800 in DX Mode **Nikkor 300mm f/4D** TC-20E III, 1/750 f/11 ISO 1100 -0.5EV. We shot this picture standing in the middle of reed not far away from this juvenile using substantial camouflage, hands & face covered, very quietly and did not disturb this bird at all. **Crop 2700 x 1800**. *Famous great oldtimer lens: non-VR!*

Reach = (13/17 x 30/6 x 600/1050)² x (2100/2700)² x 100% => 200 % detail benchmark picture.

The bird-image-area picture about 2 times as large as in benchmark picture, main factor being very small distance.

Example 6 using cropping level 2700 x 1800

Holland Cormorant (Aalscholver), sun, D500 Nikkor 500mm f/5.6E PF VR **size 90cm distance 40m (EXIF data 39.79m), 35mm equivalent 1050mm**, standard camouflage, **APERTURE Mode Birds Reach** 1/1000 second f/8 ISO 140 -2.5 EV. **Crop 2700 x 1800**.

Reach = (90/17 x 30/40 x 600/1050)² x (2100/2700)² x 100% =>80% reach benchmark picture.

A larger bird, larger distance and a larger equivalent created this three times the size of the bird-image-area benchmark in this picture of a rather beautiful bird resting high up in a thirty meter high old tree.

Example 7 using cropping level 2400 x 1600

Reach = (17/17 x 30/40 x1500/1050)² x (2100/2400)² x 100% => 100% reach compared to the benchmark picture-situation.

Example 8 using cropping level 2700 x 1800

kinfisher — *Holland sun Kingfisher (IJsvogel) **size 17 cm distance 40m meter equivalent 1500mm** **exceptionally clean atmosphere** Z50 Nikkor 500mm f/5.6E PF VR substantial camouflage.*
**Crop 2700 x 1800**.

Reach = (17/17 x 30/35 x 1050/1050)² x (2100/2700)² x 100% +15% => 90 % detail benchmark picture.

The bird-image-area of this picture is somewhat smaller than the bird-image-area benchmark picture, caused by a somewhat larger distance bird but exceptionally clean atmosphere adds 15% to reach here. A quiet, simple but fine picture! Notic the clearly red-orange well detailed feet of this adult Kingfisher at this lare distance!

Example 9 using cropping level 1900 x 2700

swallow juvenile — Holland June 2023 deep shadow Swallow (Boerenzwaluw) 19cm distance 6m size 40cm equivalent 750mm Z50 Nikkor 500mm f/5.6E PF VR standard camouflage. APERTURE Mode Birds 1/250 second f/5.6 ISO 6400 +0.0 EV. At 6400 ISO quite acceptable picture of Z50. **Crop 1900 x 2700**.

Reach = (15/15 x 30/35 x 1050/1050)² x (2100/2700)² x 100% +15% => 90 % detail benchmark picture.

The bird-image-area of this picture is somewhat smaller than the bird-image-area of the benchmark picture, caused by a somewhat larger distance bird which is partially compensated by exceptionally clean atmosphere which adds 15%. Like always the spot of light in the eye makes the picture being alive!

whooper swan — *Holland Whooper Swan (Wilde Zwaaan) size 150cm distance 50m sun some snow V3 Nikkor 300mm f/4E PF VR equivalent 1135mm total camouflage.*

Reach = (15017 x 50/30 x 1135/1050)² x (2100/1000)² = qqq

Example 10 quantifying reach using cropping level 1500 x 1000

Reach = (17/17 x 30/22 x 630/1050 x (qqq/1000)² = qqq

The bird-image-area of this picture is over 1.5 times as large as the bird-image-area of the benchmark picture and will contain significantly more detail than the bird-image-area of the benchmark picture. By the way notice the fine quality, rich detail, great colour depth, high contrast and low noise level in midwinter wheather produced by this high quality full frame D800. This picture is a good example of sensor quality contributing to overall reach.

By the way notice the great quality, rich detail and sparkling colour depth, natural light contrast and low noise level in darkish midwinter wheather produced by this marvellous wonderful old timer full frame D800. This is also an example of sensor quality (not sensor size!) contributing to the level of detail.

Example qqq quantifying reach using cropping level 3900 x 2600

Reach = (35/17 x 30/25 x 1050/1050)² x (2100/3900)² = 200% detail benchmark picture.

Example qqq quantifying reach using cropping level

Reach = (15/20 x 30/15 x 1135/1050)² x 100% => 150 % detail benchmark picture. qqq @dik check

Example 16 quantifying reach using cropping level

Reach = (17/17 x 30/22 x 630/1050)² x (1500/2100)² x 100% => 160% (corrected via C_sensor = 10%) =>180% detail benchmark picture (@dik correction crop level).

Example qqq quantifying reach using cropping level 3300 x 2200

winchat — *Holland cloudy Winchat (Paapje) **size 13cm 15m equivalent 1500mm** Z50 Nikkor 500mm f/5.6E PF VR 1/1000 f/11 ISO 1100 -0.10EV total camouflage. **Crop 3300 x 2200**.*

Reach =

Example qqq quantifying reach using cropping level

black-headed gull — Holland cloudy Black-headed Gull (Kokmeeuw) size 40cm distance 25m Z50 NIkkor 500mm f/5.6E PF VR equivalent 1500mm standard camouflage.

Reach =

Example qqq quantifying reach using cropping level

Morocco sun qqq (qqq Ekster) size qqq cm distance 30 equivalent 1200mm Nikon Fieldscopee ED82 Panasonic G3 Lumix 20mm f/1.7 standard camouflage 1/500 f/1.7 ISO 160 -0.3EV. Crop 2100 x 1400.

Reach =

Example qqq quantifying reach using cropping level

st helena phaesant — Algarve sun St. Helena Phaesant (St Helena Fazantje) size 50cm distance 20m actual equivalent 750mm D300 Nikkor 300mm f/2.8 VR total camouflage 1/1000 f/5.6 ISO 200 0EV. Crop 3000 x 2000.

Reach =

Example qqq quantifying reach using cropping level

common tern — Holland Aug 2023 sun Common Tern (Visdief) 35cm distance 50m equivalent 1500mm Z50 Nikkor 500mm f/5.6E PF VR APERTURE Mode Birds Fast 1/1000 f/11 ISO 250 0EV standard camouflage. Crop 3000 x 2000.

Reach =

Example qqq quantifying reach using cropping level

The following pictures of a SD card, at 16.5 meter, 15 meter and 13.5 meter, llustrate the substantial quadratic effect of one of the three “quadratic rules”: when you photograph something at distances of plus or minus 10 percent, the resulting pictures show significant difference in detail! We use this quadratic rule for distance in the over and over again:

(click -> open picture, > < next/previous picture, i -> info & settings camera & lens, “Full size” -> full screen, x-> Exit picture)