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Hyperfocal Length? - 25-05-2007, 15:50

Dear Seniors,

Saya sedikit banyak udah tau arti hyperfocal length dari wikipedia,
namun ada sedikit yang saya ingin tanyakan.
Apakah:

1. Hyperfocal length = jarak antara kita dengan objek ?

2. Kalau bukan, lensa 300mm itu sama dengan berapa meter jarak antara kita dengan objek yang kita foto? (misalnya kalau kita fotoin tembok atau seseorang)

Mohon pencerahannya,suhu!
Sangat diperlukan nih. ^_^
Terima kasih ya sebelumnya.
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Re: Hyperfocal Length? - 29-05-2007, 23:42

buat sekalian review, menurut wikipedia :

Quote:
In optics and photography, hyperfocal distance is a distance beyond which all objects can be brought into an "acceptable" focus. There are two commonly used definitions of hyperfocal distance, leading to values that differ only slightly:


The first definition: the hyperfocal distance is the closest distance at which a lens can be focused while keeping objects at infinity acceptably sharp; that is, the focus distance with the maximum depth of field. When the lens is focused at this distance, all objects at distances from half of the hyperfocal distance out to infinity will be acceptably sharp.


The second definition: the hyperfocal distance is the distance beyond which all objects are acceptably sharp, for a lens focused at infinity.


The distinction between the two meanings is rarely made, since they are interchangeable and have almost identical values. The value computed according to the first definition exceeds that from the second by just one focal length.
kalo diartikan sih berarti hyperfocal length/distance adalah jarak terdekat dimana objek dalam keadaan focus sedangkan objek pada infinity tetap tajam...

gw enggak gitu ngerti pertanyaan TS...tapi kalo berdasarkan definisi diatas...bisa dijawab tidak...lebih tepat nya sih jarak kita ke sebuah titik, dimana seluruh gambar foreground ato background tetap tajam

aplikasi nya sebagian besar pada photo2 landscape dimana seluruh photo terlihat tajam dan fokus....

diagram nya kurang lebih kayak gini :



dikutip dari : http://www.cambridgeincolour.com/tut...l-distance.htm

untuk mendapatkan photo seperti ini :



dikutip dari : http://www.vividlight.com/articles/2314.htm

hyperfocal distance dapat dihitung dengan tersedia nya beberapa variabel yaitu focal length dan aperature...

rumus nya :


Quote:
where
H is hyperfocal distance f is focal length N is f-number (f / D for aperture diameter D) c is the circle of confusion limit
dikutip dari : http://en.wikipedia.org/wiki/Hyperfocal_distance

ribet khan....

tenang aja...ada tabel yang bisa di download courtesy of nikonians
disini :
untuk lensa2 17 s/d 1000 mm tapi untuk kamera 35mm biasa (non digital ) : http://www.nikonians.org/html/resour...f/tablesl1.pdf
untuk wide angle lens bagi nikon dan fuji digital : http://www.nikonians.org/html/resour...gle_tables.pdf

Untuk digital yang lain nya dan focal length yang lain nya bisa menggunakan calculator yang ada di sini : http://www.nikonians.org/html/resour...perfocal2.html
http://www.cambridgeincolour.com/tut...l-distance.htm

link2 yang juga berguna :
http://www.nikonians.org/html/resour...perfocal1.html
http://luminous-landscape.com/forum/...hp/t15335.html
http://www.dofmaster.com/hyperfocal.html

tolong dikoreksi kalo ada yang salah...just a thought from me

semoga membantu



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Selling Asetek WC Kit...anybody interested just PM me....
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Re: Hyperfocal Length? - 04-06-2007, 14:23

Berarti asumsi saya itu bener.
Hyper focal length = titik terjauh fokus kita = jarak antara kita dengan obyek

H = F x F / Nc + F:
- 300mm + F22 = 439meter
- 300mm + F4,5 = 2000meter


Yang ingin saya tau tuh sebenarnya simple sih.
Kalau lensa 300mm, maksimal berapa jauh jarak obyek dengan kamera?
misalnya kita mau foto seseorang, kita berdiri diam dan obyeknya kita suruh jalan menjauh dari kita, sampai berapa meter-kah jarak terjauh yang bisa kita foto obyek kita itu?

Maaf kalau pertanyaannya sedikit aneh.
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Re: Hyperfocal Length? - 13-06-2007, 10:17

Quote:
Originally Posted by god_father View Post
Berarti asumsi saya itu bener.
Hyper focal length = titik terjauh fokus kita = jarak antara kita dengan obyek

H = F x F / Nc + F:
- 300mm + F22 = 439meter
- 300mm + F4,5 = 2000meter


Yang ingin saya tau tuh sebenarnya simple sih.
Kalau lensa 300mm, maksimal berapa jauh jarak obyek dengan kamera?
misalnya kita mau foto seseorang, kita berdiri diam dan obyeknya kita suruh jalan menjauh dari kita, sampai berapa meter-kah jarak terjauh yang bisa kita foto obyek kita itu?

Maaf kalau pertanyaannya sedikit aneh.
asumsi anda kurang lebih benar...untuk menghitung nya tolong liat link2 yang sudah saya berikan karena di sana terdapat calculator untuk menghitung hyperfocal distance

saya ulangi link nya ini :
http://www.nikonians.org/html/resour...perfocal2.html
http://www.cambridgeincolour.com/tut...l-distance.htm

semoga membantu...
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Re: Hyperfocal Length? - 13-06-2007, 20:59

Quote:
Originally Posted by god_father View Post

Kalau lensa 300mm, maksimal berapa jauh jarak obyek dengan kamera?
misalnya kita mau foto seseorang, kita berdiri diam dan obyeknya kita suruh jalan menjauh dari kita, sampai berapa meter-kah jarak terjauh yang bisa kita foto obyek kita itu?
Well, dengan lensa 300mm saya bisa motret bulan, which is 384.400.000 meters away.
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