D90 User Group (Thread III)

[ZerocoolAstra]

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?

UWA = ultra-wide angle lens. Something like Tokina 12-24mm, or similar (for a dx camera). Google 'ultra wide angle lens'.

slot-in filters are square pieces of glass/plastic filters. Unlike the traditional screw-on type, they require adapter ring, holder, and the filter.

ND110 is a 10stop neutral density filter... can google for more info.

 

[ZerocoolAstra]

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

It's not always true. CPL is a polarizing filter. Whether or not it can cut down the reflection and deepen the blues in the sky is very much dependent on the amount of polarization in the light, which is strongly related to the angle of the light source and the type of light source.

 

[ZerocoolAstra]

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?

Your question sounds confusing.
You're asking if it's necessary to switch BOTH the focus-mode selectors on lens as well as body to manual, if you wish to use manual focus?
The answer is NO. As long as either is not in 'auto', you are in manual focus mode.
If your lens has M/A, then you half press to let it auto-focus, and whilst holding the half-press, you can manually fine-tune the focus to your hear's content before firing.

 

[Smiles88]

It's not always true. CPL is a polarizing filter. Whether or not it can cut down the reflection and deepen the blues in the sky is very much dependent on the amount of polarization in the light, which is strongly related to the angle of the light source and the type of light source.

UWA = ultra-wide angle lens. Something like Tokina 12-24mm, or similar (for a dx camera). Google 'ultra wide angle lens'.

slot-in filters are square pieces of glass/plastic filters. Unlike the traditional screw-on type, they require adapter ring, holder, and the filter.

ND110 is a 10stop neutral density filter... can google for more info.

thanks bro. I was searching through CS for more information on ND and GND filters to post here. But my office workstation is beyond slow...

 

[ZerocoolAstra]

square filter

square filter -- holder -- ring adapter -- lens -- camera

 

[jeezuinn]

Your question sounds confusing.
You're asking if it's necessary to switch BOTH the focus-mode selectors on lens as well as body to manual, if you wish to use manual focus?
The answer is NO. As long as either is not in 'auto', you are in manual focus mode.
If your lens has M/A, then you half press to let it auto-focus, and whilst holding the half-press, you can manually fine-tune the focus to your hear's content before firing.

Say for instance my lens has only A/M modes ie kit kens. on A mode i half press the shutter to let it AF, but then i manually turn the focus ring to choose my focus. Are there any implications?

 

[Smiles88]

Say for instance my lens has only A/M modes ie kit kens. on A mode i half press the shutter to let it AF, but then i manually turn the focus ring to choose my focus. Are there any implications?

wah lao bro! YOU OF ALL PEOPLE NV READ USER MANUAL?!?! next time we meet I print out the page highlight it for you. It's okay to do tt. I remember reading it before.

 

[jeezuinn]

wah lao bro! YOU OF ALL PEOPLE NV READ USER MANUAL?!?! next time we meet I print out the page highlight it for you. It's okay to do tt. I remember reading it before.

Got read la, but cannot rmb everything :bsmilie:. Normally will take note more of the functions i use more often, so will neglect others. So you're saying its perfectly fine to turn the focus ring manually even in Auto focus mode? In that case certain lens provide 'Manual AF override', what does that do?

 

[bitez]

square filter

square filter -- holder -- ring adapter -- lens -- camera

thanks for the pic.. but office network doesnt allow me to view directly.. gotta view from iphone instead... :what:

 

[Smiles88]

Got read la, but cannot rmb everything :bsmilie:. Normally will take note more of the functions i use more often, so will neglect others. So you're saying its perfectly fine to turn the focus ring manually even in Auto focus mode? In that case certain lens provide 'Manual AF override', what does that do?

haha. My hobby is to read user manuals (kind of). Yeah, I believe it's ok. Think about it. After AF, the focus mechanism is already in position, but it's not locked. But if you're using AF-D lenses, like 50mm f1.8, I tried it before. Focus ring was kind of stiff.

As for Manual AF override, what's tt? Where you read it? I want to find out about this. Sounds quite interesting, the 'override' part. But it may be referring to using MF after AF.

 

[jeezuinn]

haha. My hobby is to read user manuals (kind of). Yeah, I believe it's ok. Think about it. After AF, the focus mechanism is already in position, but it's not locked. But if you're using AF-D lenses, like 50mm f1.8, I tried it before. Focus ring was kind of stiff.

As for Manual AF override, what's tt? Where you read it? I want to find out about this. Sounds quite interesting, the 'override' part. But it may be referring to using MF after AF.

Manual AF override is a function provided in certain lenses. Instead of A and M mode, they have M/A and A mode or something like that. Thats what im curious about haha

 

[pasay]

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:

18-105mm has a 67mm thread while the 50mm has a 52mm thread, so can't share. UV and CPL has different functions. UV filter is mostly used as protection of lenses' front element as dSLRs dont suffer the same UV problems as film SLRs used to. so for most, they have a UV filter for every lens they have

 

[pasay]

Manual AF override is a function provided in certain lenses. Instead of A and M mode, they have M/A and A mode or something like that. Thats what im curious about haha

M/A is actually AutoFocus with Manual Priority. means after you AF you can still do MF to fine tune your focusing. IIRC, A mode will not allow you to manually focus after you have focused using AF. correct me if i'm wrong

 

[jeezuinn]

M/A is actually AutoFocus with Manual Priority. means after you AF you can still do MF to fine tune your focusing. IIRC, M mode will not allow you to manually focus after you have focused using AF. correct me if i'm wrong

Sorry a little confused here. If in M mode, it wont even AF at all since its manual right? You're supposed to manually focus

 

[pasay]

Sorry a little confused here. If in M mode, it wont even AF at all since its manual right? You're supposed to manually focus

right, sorry. i meant if you were on A mode, it won't allow you to manually focus after you have focused using AF. will edit earlier post. :sweat:

 

[jeezuinn]

right, sorry. i meant if you were on A mode, it won't allow you to manually focus after you have focused using AF. will edit earlier post. :sweat:

I tried manually focusing after focusing using AF before. Turning the ring still changes the focus. But i heard that if your lens doesnt have the Manual focusing overwrite, doing that will spoil the lens lol. Not too sure about that, guess ill go do some reading up

 

[quizesilver]

Your question sounds confusing.
You're asking if it's necessary to switch BOTH the focus-mode selectors on lens as well as body to manual, if you wish to use manual focus?
The answer is NO. As long as either is not in 'auto', you are in manual focus mode.
If your lens has M/A, then you half press to let it auto-focus, and whilst holding the half-press, you can manually fine-tune the focus to your hear's content before firing.

ZCA, i think u are "lost"
i think he is asking do he need to switch to Manual on the body and lens to get manual focusing

the ans is no need. either the body or lens will do. body will be at the "corner" of the lens mount.

btw AF-S, u can over ride it by turning it straight. take note, the rest cannot.

 

[quizesilver]

I tried manually focusing after focusing using AF before. Turning the ring still changes the focus. But i heard that if your lens doesnt have the Manual focusing overwrite, doing that will spoil the lens lol. Not too sure about that, guess ill go do some reading up

right, sorry. i meant if you were on A mode, it won't allow you to manually focus after you have focused using AF. will edit earlier post. :sweat:

Sorry a little confused here. If in M mode, it wont even AF at all since its manual right? You're supposed to manually focus

k i am kinda lost. u all are asking abt the lens focusing or the control dial???

on the focusing, read the above.
on control dial

M- manual where u can do adjustment on the shutter speed and aperture,
A - only can adjust the aperture and the shutter speed, the camera will adjust itself
S - only can adjust the shutter speed and the camera will adjust the aperture itself.

 

[quizesilver]

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???

yup, u are right.
not a must, but depends on how ex is the filter.

also for "look"

imagine, a 50mm having a 52mm filter put a step up ring of 67mm, it will be so "funny" (67-52= 15. 15/2 = 7.5mm around) and how u going to cap and bring ard, most prob u will crack the 67mm filter before u know it.

 

[ZerocoolAstra]

haha. My hobby is to read user manuals (kind of). Yeah, I believe it's ok. Think about it. After AF, the focus mechanism is already in position, but it's not locked. But if you're using AF-D lenses, like 50mm f1.8, I tried it before. Focus ring was kind of stiff.

As for Manual AF override, what's tt? Where you read it? I want to find out about this. Sounds quite interesting, the 'override' part. But it may be referring to using MF after AF.

woah woah woah... hold your horses there...
you can ONLY do a manual override of the focusing if your lens is designed that way.
For Nikkor lenses, the focus-mode switch will be denoted M---M/A (or M --- A/M. Can't remember exactly)
only then can you override.
If the switch is denoted M---A, then please don't try. The clutch will not slip.

Never try to do manual focus on a lens like AF 50/1.8D when your camera's switch is at A.