If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
SB-400 Bounce Flash
pago writes:
Dear All, According to the nikon speedlight sb-400 user manual, you should use larger aperture settings (e.g. f3.6, f4.0, f5.6) if you wish to bounce flash. How can this be? Can anyone explain the rationale behind this? As for me, I would do the opposite because a bounce flash has more distance to travel, and therefore, to compensate, i would stop down the aperture to allow more light in. (All things being equal, off course.) I apologize on behalf of 100+ years of photographic history. The terminology for lens apertures is indeed confusing; your problem is that you have been confused by it. Larger f-numbers (as in, 8 is larger than 5.6 is larger than 4) means *smaller* actual apertures and less light let through. F-numbers are the ratio of focal length to aperture size (in the same units; they're a dimensionless number). Larger aperture means smaller f-number, because the aperture is in the denominator. -- David Dyer-Bennet, ; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info |
#2
|
|||
|
|||
SB-400 Bounce Flash
In article , David Dyer-Bennet
wrote: snip Larger f-numbers (as in, 8 is larger than 5.6 is larger than 4) means *smaller* actual apertures and less light let through. F-numbers are the ratio of focal length to aperture size (in the same units; they're a dimensionless number). Larger aperture means smaller f-number, because the aperture is in the denominator. S'funny. I knew all the f number stuff, how it was defined and all, yet never connected the dots when people said f/8 rather than f8. I spent the last 50 years thinking the "/" was affectation. Who says you can't teach an old dog new tricks? -- To de-mung my e-mail address:- fsnospam$elliott$$ PGP Fingerprint: 1A96 3CF7 637F 896B C810 E199 7E5C A9E4 8E59 E248 |
#3
|
|||
|
|||
SB-400 Bounce Flash
Elliott Roper writes:
In article , David Dyer-Bennet wrote: snip Larger f-numbers (as in, 8 is larger than 5.6 is larger than 4) means *smaller* actual apertures and less light let through. F-numbers are the ratio of focal length to aperture size (in the same units; they're a dimensionless number). Larger aperture means smaller f-number, because the aperture is in the denominator. S'funny. I knew all the f number stuff, how it was defined and all, yet never connected the dots when people said f/8 rather than f8. I spent the last 50 years thinking the "/" was affectation. I know the feeling; I really noticed that as significant not all that long ago myself (less than your 50 years). Who says you can't teach an old dog new tricks? Sometimes, sometimes. -- David Dyer-Bennet, ; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
SB-400 Bounce Flash | Eric Stevens | Digital SLR Cameras | 0 | February 20th 12 09:08 AM |
Bounce Flash | format | Other Photographic Equipment | 4 | February 20th 06 05:44 AM |
Can TTL be used with bounce flash? | David Arnstein | Digital Photography | 15 | February 10th 06 11:55 AM |
Bounce Flash | measekite | Digital Photography | 0 | January 1st 05 08:01 PM |