D90 User Group (Thread III)

[kennynah]

on flash...i believe it is all to do with correct exposure... the camera body TTL senses the amount of light and exposes the aperture and shutter speed accordingly.

unless you use handheld light metering device, which comes in 2 primary categories; namely incident and reflection metering, most dslrs will automatically measure light TTL... the difference in how the images turn out will be judgmental decision on where to meter as 18% grey... i believe most folks will "spot" meter TTL and then lock it, then move the viewfinder to compose and "snap".

the challenge appears when we have very contrasting brightness and dark shadows and when snapping with sunlight infront of lens, causing unwanted "silhouetting"

my 1 cent

 

[daredevil123]

chim sia. still cant really tell the difference.

does that means that those usual flash that we use are considered as auto-flash which can operate in TTL or non-TTL mode? at the same time, it can also operate when we change to manual mode dial in the camera?

Simple. Auto mode, you need to enter the APERTURE and ISO values into the flash manually. And if zoom is available, you need to zoom the head yourself.

TTL no need to do any of the above.

 

[daredevil123]

on flash...i believe it is all to do with correct exposure... the camera body TTL senses the amount of light and exposes the aperture and shutter speed accordingly.

unless you use handheld light metering device, which comes in 2 primary categories; namely incident and reflection metering, most dslrs will automatically measure light TTL... the difference in how the images turn out will be judgmental decision on where to meter as 18% grey... i believe most folks will "spot" meter TTL and then lock it, then move the viewfinder to compose and "snap".

the challenge appears when we have very contrasting brightness and dark shadows and when snapping with sunlight infront of lens, causing unwanted "silhouetting"

my 1 cent

Hmmm.. I don't really understand what you are saying.

Actually just remember one thing, for TTL, flash metering and camera metering are 2 separate and totally unrelated things/systems. The metered exposure from the flash will not affect the metered exposure from the camera and vise versa.

Basically the camera meters the scene as if the flash is not there. But the camera will send the aperture, ISO, focal length and focused distance to the flash. The flash do not send any info back to the cam. The flash will take the info collected from the camera, and does its own metering. And the flash only meters the subject that is more or less in the center of the frame. That is why when you shoot flash, try to place your subjects in the middle of the frame. If your subjects are off center, you need to use FV Lock.

So the key is to 1) expose camera to background, 2) let flash expose for the subject.

 

[fatigue]

Might be something simple like a connection that got knocked loose. or might be something serious. You never know. Anyway, just bring it in to NSC to get an evaluation. Or look for fatigue.

I suspect some connections (maybe as simple as the battery connector) got loose, or broken.
2 choices:
a) DIY repair
b) send to NSC or someone capable, like Fatigue.

for my SB600, I would choose option a)

Thanks bros,
For such kind of situation, usually it's the flash tube that gets damaged.

I saw someone selling the parts in ebay
http://cgi.ebay.com/NIKON-SB-600-SB...igital_Camera_Accessories&hash=item27b2d0e77f
If you know how to replace.

 

[kennynah]

daredevil123

many thanks... it was a great "throw brick to attract Jade" (抛砖引&#29577

 

[daredevil123]

daredevil123

many thanks... it was a great "throw brick to attract Jade" (抛砖引&#29577

Sorry dude. That chengyu is too deep for me. Care to explain?

 

[cheesy]

Simple. Auto mode, you need to enter the APERTURE and ISO values into the flash manually. And if zoom is available, you need to zoom the head yourself.

TTL no need to do any of the above.

auto mode is also known as non-TTL?

 

[ZerocoolAstra]

auto mode is also known as non-TTL?

wah... your questions getting more and more difficult to answer.

Based on DD123's explanation, there's
- TTL (Nikon calls it i-TTL if I'm not mistaken) --- camera communicates w flash
- Auto --- data needs to be entered to flash. Power calculated automatically
- Manual --- adjust power as fractions (eg. 1/1, 1/2, 1/32, etc

 

[daredevil123]

auto mode is also known as non-TTL?

wah... your questions getting more and more difficult to answer.

Based on DD123's explanation, there's
- TTL (Nikon calls it i-TTL if I'm not mistaken) --- camera communicates w flash
- Auto --- data needs to be entered to flash. Power calculated automatically
- Manual --- adjust power as fractions (eg. 1/1, 1/2, 1/32, etc

Yes. When people say Auto mode, it usually means Auto non-TTL mode.

 

[cheesy]

thanks ZerocoolAstra & daredevil123.

looks like the Di866 and SB900 can do TTL, non-TTL Auto and Manual while Di622 Mark II and SB600 can only do TTL and Manual.

 

[ZerocoolAstra]

thanks ZerocoolAstra & daredevil123.

looks like the Di866 and SB900 can do TTL, non-TTL Auto and Manual while Di622 Mark II and SB600 can only do TTL and Manual.

until DD123 mentioned it, I didn't even know there was a non-TTL auto mode.
If you get a flash with TTL capability, I don't see why you'd want to use non-TTL. Quite troublesome.

One of the reasons why people buy Nikon speedlights for wireless multiple flash setup, is that there is TTL capability via infrared communication to the flash units. Otherwise with conventional radio triggers it's just manual, so some calculation or guesswork is required.

 

[kennynah]

Sorry dude. That chengyu is too deep for me. Care to explain?

抛砖引玉 in this context is to solicit good pointers from others by initiating a simple discussion - literally, one throws "bricks" and attract "jade" in return .. and jade being a prized gem

so, like we were discussing "flash", "TTL" and you offered many precious info and shared knowledge.. that's the "jade" we get...

 

[mackie8]

i just got my new D90 last saturday...

im now looking for a dry cabi and bag for my new toy...

 

[Smiles88]

i just got my new D90 last saturday...

im now looking for a dry cabi and bag for my new toy...

Congrats! It's good tt you're already looking to buy a dry cabinet. It's a good investment.

For your bag, go down to the stores to have a look/feel of what they are like.

 

[ZerocoolAstra]

i just got my new D90 last saturday...

im now looking for a dry cabi and bag for my new toy...

welcome to the club!
try to think if you'll likely start buying more and more stuff (lenses, filters, etc). This will help you estimate how large a dry cabinet you need.
Of course you can also store other stuff in there, like stamps, uni cert, etc.... :bsmilie:

bag - think of what type you want first. Shoulder, sling, waist, backpack, etc.
I quite like Lowepro for value-for-money, though have been a bit poisoned by Thinktank products of late...

 

[daredevil123]

抛砖引玉 in this context is to solicit good pointers from others by initiating a simple discussion - literally, one throws "bricks" and attract "jade" in return .. and jade being a prized gem

so, like we were discussing "flash", "TTL" and you offered many precious info and shared knowledge.. that's the "jade" we get...

ooooo... ok..

 

[Smiles88]

welcome to the club!
try to think if you'll likely start buying more and more stuff (lenses, filters, etc). This will help you estimate how large a dry cabinet you need.
Of course you can also store other stuff in there, like stamps, uni cert, etc.... :bsmilie:

bag - think of what type you want first. Shoulder, sling, waist, backpack, etc.
I quite like Lowepro for value-for-money, though have been a bit poisoned by Thinktank products of late...

tt's y I got my 50l one. Still got space for about 1 or 2 more bodies, and maybe 3 lenses? Anyone wants to help by contributing? Maybe a Tokina 11-16, 35 f1.8 will do. :bsmilie::devil:

 

[mackie8]

im eyeing for the cheapest digi cabi 30L ..do u think it will be enough for D90+Kit lens(mounted) , 50mm prime(in the future) , and flash(in the future)...?

 

[Smiles88]

It will be big enough. But actually, if you're intending to get more than just a flash and a prime in future, you may want to consider getting a dry cabinet with a larger capacity. Before you know it, the space is filled up. Of course, if all you're intending to get is the 50mm prime and the flash, a 30l one should be sufficient.

 

[ZerocoolAstra]

im eyeing for the cheapest digi cabi 30L ..do u think it will be enough for D90+Kit lens(mounted) , 50mm prime(in the future) , and flash(in the future)...?

The cheapest one is already over $100. For a bit more $, you can get a lot more space.
But it all depends on how much space you have at home for this cabinet.
30L probably can fit 2 bodies and 4 lenses. Flash is not really necessary to keep in there.