D90 User Group (Thread III)

[quizesilver]

Flash photography is pretty complicated, but thankfully most DSLRs with modern flashguns help with the calculation to some extent. Hence I feel it has become an "art" more than a science nowadays
But essentially a flash provides illumination, that's it.
Whether it will allow a faster shutter speed or not will depend a lot on distance.
For example, if I'm standing at Merlion Park and photographing MBS. Even if I had 2x SB900, do you think my exposure will be affected at all?

bro u need flood light not flash light! haha

 

[ijnek]

thanks!

btw will having speedlight help to boost the SS? it should reduce motion blur too right?

motion blur due to slow shutter speed.
u can boost up the iso or use a wider aperature so that u can use a faster shutter speed.
a flash will help u to get better exposure, but still depends on the distance between u and ur subject.
most flashs have a range n power which u can check the spec.
if i'm not wrong, between sb900, sb600 & sb700, the power from strongest to weaker r as followed : sb900, sb600 & sb700.
go compare on nikon website

 

[daredevil123]

motion blur due to slow shutter speed.
u can boost up the iso or use a wider aperature so that u can use a faster shutter speed.
a flash will help u to get better exposure, but still depends on the distance between u and ur subject.
most flashs have a range n power which u can check the spec.
if i'm not wrong, between sb900, sb600 & sb700, the power from strongest to weaker r as followed : sb900, sb600 & sb700.
go compare on nikon website

I thought SB700 is stronger than SB600?

I though it should be (strong to weak): SB900, SB800, SB700, SB600, SB400.

Edit.. you are right. SB600 is indeed very slightly more powerful than the SB700... I stand corrected.

 

[quizesilver]

dun noe wat does guide no says.

http://www.kenrockwell.com/nikon/flashes-compared.htm

 

[ZerocoolAstra]

dun noe wat does guide no says.

http://www.kenrockwell.com/nikon/flashes-compared.htm

you're asking about the definition of the term 'guide number' ?

It's a description of the distance that the flash can cover/illuminate given other fixed parameters. Basically larger GN = more power

 

[quizesilver]

you're asking about the definition of the term 'guide number' ?

It's a description of the distance that the flash can cover/illuminate given other fixed parameters. Basically larger GN = more power

hmm so that mean to say SB700 is "less" powerful in term of Guide number to Sb600.

 

[Smiles88]

erm. yes... but it's not tt great of a difference.

 

[bitez]

if im gonna get a 50mm 1.8, even though i have a 67mm UV filter for my kit lens, i should still get a 52mm filter right?

anyone? :embrass:

 

[quizesilver]

anyone? :embrass:

depend on u.
the "hole" for 50mm is quite deep. if u drop most prob will not hurt the lens.
but then i got put a uv filter in front too.

 

[jojovan]

2 words. Zoom in. Haha. Make sure it's at least very sharp on the LCD display. Or at least, acceptable to you

May I ask?
Q1) During Zoom in, is it a must to set BOTH the lens+Camera(Focus-mode selector) to Manual mode? Will it serious spoil the lens motor or something if I do not?

The scenario is as such:At all time, the mode dial is in AUTO I had already AF a clear picture of a flower( Got the focus for the flower and leafs; initially do not want a close up of the flower). Suddenly I decided that the flower(want a close up of it only) is very nice, but I had not zoom in(Close up) closely to make the flower my main subject. At this particular moment, when i decided that I want to zoom in more(to get a bigger picture of the flower), my question apply.

Q2) I just take out my camera, dial mode+lens+Camera(Focus-mode selector) ALL in auto. Suddenly I decided to a close up of a flower, I forget to set lens+Camera(Focus-mode selector) to Manual-mode, will it damage any thing in long run?

 

[bitez]

depend on u.
the "hole" for 50mm is quite deep. if u drop most prob will not hurt the lens.
but then i got put a uv filter in front too.

hole? u mean the distance between the "rim" and the lens?

oh den must get many different sizes of filter for different sizes of lens???

 

[Smiles88]

erm. To me, yes.

Are you considering using the same UV filter for both your lenses?

I bought a 52mm filter for my 50mm f1.8. To me, it saves the trouble of changing the filter from my kit lens to my 50mm. Moreover, I treat it as a form of protection for my lens.

 

[bitez]

erm. To me, yes.

Are you considering using the same UV filter for both your lenses?

I bought a 52mm filter for my 50mm f1.8. To me, it saves the trouble of changing the filter from my kit lens to my 50mm. Moreover, I treat it as a form of protection for my lens.

hmm our kit lens uses 67mm filter rite? so cannot share the same filter for 50mm f1.8....

now deciding between a UV filter or CPL filter for the 50mm lens.. since its either this OR dat.. :what:

 

[Smiles88]

hole? u mean the distance between the "rim" and the lens?

oh den must get many different sizes of filter for different sizes of lens???

yes to your first question.

For your 2nd question, tt is the reason why we get 77mm sized ND/CPL filters, unless we are using the slot-in type. 77mm is because it is a common filter thread sized used in UWAs(if I'm not wrong), and anything above 77mm thread size may be a little difficult to find(to me at least).

With a 77mm filter, all we have to do is get step-up rings. A step-up ring costs about $10-$15, while some filters, like the ND110, cost more than $100.

 

[Smiles88]

hmm our kit lens uses 67mm filter rite? so cannot share the same filter for 50mm f1.8....

now deciding between a UV filter or CPL filter for the 50mm lens.. since its either this OR dat.. :what:

yup yup 67mm thread size. Can share. but you need to use step up rings. Not worth the effort. You can have both UV filter and CPL filter. Just try not to have both on at the same time. You have to know what the CPL filter is used for.

 

[bitez]

yes to your first question.

For your 2nd question, tt is the reason why we get 77mm sized ND/CPL filters, unless we are using the slot-in type. 77mm is because it is a common filter thread sized used in UWAs(if I'm not wrong), and anything above 77mm thread size may be a little difficult to find(to me at least).

With a 77mm filter, all we have to do is get step-up rings. A step-up ring costs about $10-$15, while some filters, like the ND110, cost more than $100.

ohh...

hmm pls bear with this newbie here, whats UWA? and wad do u mean by slot-in type? so it'll be better to get a 77mm filter, with a step up ring ( why rings?) so dat we can easily switch the filter to different sizes of lens? is the step up ring bulky? will it cause the distance of the filter to be further from the lens thus causing distortion?

erm.. ND110 filter is wad ar? v gd one?

 

[ZerocoolAstra]

hmm our kit lens uses 67mm filter rite? so cannot share the same filter for 50mm f1.8....

now deciding between a UV filter or CPL filter for the 50mm lens.. since its either this OR dat.. :what:

I had a Hoya UV filter on my 50/1.8, then accidentally damaged it. then I realized that since I hardly use the 50/1.8, and the front element is so much recessed, that the filter is unnecessary (at least to me). So my lens has no filter. In fact most of my lenses have no filter

 

[bitez]

yup yup 67mm thread size. Can share. but you need to use step up rings. Not worth the effort. You can have both UV filter and CPL filter. Just try not to have both on at the same time. You have to know what the CPL filter is used for.

i know CPL gives the nice blue sky n water effect, and allows u to shoot whats in a restaurant, when ure outside.. haha thats the layman term i understand... ;p

 

[Smiles88]

May I ask?
Q1) During Zoom in, is it a must to set BOTH the lens+Camera(Focus-mode selector) to Manual mode? Will it serious spoil the lens motor or something if I do not?

The scenario is as such:At all time, the mode dial is in AUTO I had already AF a clear picture of a flower( Got the focus for the flower and leafs; initially do not want a close up of the flower). Suddenly I decided that the flower(want a close up of it only) is very nice, but I had not zoom in(Close up) closely to make the flower my main subject. At this particular moment, when i decided that I want to zoom in more(to get a bigger picture of the flower), my question apply.

Q2) I just take out my camera, dial mode+lens+Camera(Focus-mode selector) ALL in auto. Suddenly I decided to a close up of a flower, I forget to set lens+Camera(Focus-mode selector) to Manual-mode, will it damage any thing in long run?

ah..... Never read through your user manual thoroughly right? It's mentioned. If you wish to use MF together with AF, half-press your shutter release button first to let the AF take place, and after tt, do your MF.

I think zooming-in after AF will not cause damage, but to be on the safe side, better not to do tt. After all, it's all electronics. But when you zoom in after AF, won't you lose the focus on your subject?:dunno:

 

[pasay]

May I ask?
Q1) During Zoom in, is it a must to set BOTH the lens+Camera(Focus-mode selector) to Manual mode? Will it serious spoil the lens motor or something if I do not?

The scenario is as such:At all time, the mode dial is in AUTO I had already AF a clear picture of a flower( Got the focus for the flower and leafs; initially do not want a close up of the flower). Suddenly I decided that the flower(want a close up of it only) is very nice, but I had not zoom in(Close up) closely to make the flower my main subject. At this particular moment, when i decided that I want to zoom in more(to get a bigger picture of the flower), my question apply.

Q2) I just take out my camera, dial mode+lens+Camera(Focus-mode selector) ALL in auto. Suddenly I decided to a close up of a flower, I forget to set lens+Camera(Focus-mode selector) to Manual-mode, will it damage any thing in long run?

erm, i think what smiles meant by "zooming in" was to zoom in on the LCD screen AFTER taking the picture , i.e make the picture bigger to check for sharpness, especially at the corners.

for your questions, i think you're referring to zooming the lens BEFORE taking the picture. if you're on AF-Mode and you've already focused on your subject but decided later on that you want to recompose by zooming in, just zoom in and half-press the shutter again (to let your AF refocus). by going MF, you're just basically turning off the AF motor