Da40 f2.8

uiysses2004 · 07-04-2011, 08:26 AM

I got a new DA40. but I don't know how to use at night or dark environment.

any advice?

Mr. B · 07-04-2011, 08:42 AM

What exactly is your problem?

uiysses2004 · 07-04-2011, 08:52 AM

Originally posted by Mr. B

What exactly is your problem?

the Pic is too dark and out of focus

uiysses2004 · 07-04-2011, 08:54 AM

alphanerd · 07-04-2011, 09:06 AM

What shutter speeds are you shooting at? I assume that you're shooting wide open (f2.8), and you've increased your ISO; which camera are you using? Photography still requires some light, though

If you're having problems focusing in the dark, maybe you need an autofocus lamp or a flash (which would allow you use a higher f number and get more in focus)?

Are your subjects moving? Is SR on?

uiysses2004 · 07-04-2011, 09:12 AM

Originally posted by alphanerd

What shutter speeds are you shooting at? I assume that you're shooting wide open (f2.8), and you've increased your ISO; which camera are you using? Photography still requires some light, though

If you're having problems focusing in the dark, maybe you need an autofocus lamp or a flash (which would allow you use a higher f number and get more in focus)?

Are your subjects moving? Is SR on?

I am new Kr user.

try to attach a photo.but failed, how to attached the photo?

Andi Lo · 07-04-2011, 10:14 AM

Just upload the picture here and copy the [IMG] tags you get later from the website to the forum.

ImageShack® - Online Photo and Video Hosting

Pentaxor · 07-04-2011, 02:21 PM

wrong section.

Eagle_Friends · 07-04-2011, 07:21 PM

um... you should do a search on google or something and learn how to utilize the dSLR body for dim-light situation (higher ISO, tripod, etc.)

the 40mm f2.8 is a pretty fast lens, but it is not intended for low light shooting. For that, you should try getting a lens with an aperture of f2 or lower.

paperbag846 · 07-04-2011, 07:55 PM

Originally posted by Eagle_Friends

the 40mm f2.8 is a pretty fast lens, but it is not intended for low light shooting. For that, you should try getting a lens with an aperture of f2 or lower.

For his usage, I doubt a fast lens with slow AF would make matters better.

Put the camera in "M" mode.

Put the ISO up to the maximum value and shoot some photos.

Set the aperture to 2.8.

Press the green button.

Shoot a photo.

If the photo is still black, you are simply in too dim light. You should invest in a flash.

Pr

Eagle_Friends · 07-04-2011, 09:07 PM

Originally posted by paperbag846

For his usage, I doubt a fast lens with slow AF would make matters better.

er... it would allow more lights in, so it would help? is he talking about astronomy photographs, or did i miss that part?

i assumed that he was referring to typical day to day night shots like in a street or in a dimly lit restaurant or bar. If that's the cause, then something with a faster f-stop would definitely help.

paperbag846 · 07-04-2011, 09:52 PM

Originally posted by Eagle_Friends

i assumed that he was referring to typical day to day night shots like in a street or in a dimly lit restaurant or bar. If that's the cause, then something with a faster f-stop would definitely help.

In that case, yes, but lets be sure that its not just a setting issue and he would be fine with the 2.8 (i.e., not investing in faster glass).

Besides, DSLRs just artificially bump the iso with ultra fast glass anyways due to the limitations of sensors. Aperture is really more about low DOF, not light gathering, below about f2.4.

This is the reason that "M" glass underexposes at wide apertures.

uiysses2004 · 07-04-2011, 10:02 PM

Hi all

tks for your suggestion. will try tonight.

Marc Sabatella · 07-04-2011, 10:12 PM

Originally posted by Eagle_Friends

i assumed that he was referring to typical day to day night shots like in a street or in a dimly lit restaurant or bar. If that's the cause, then something with a faster f-stop would definitely help.

Somewhat, but you pay for that help in reduced DOF. I personally find f/2.8 the sweet spot.

**Rondec** · 07-05-2011, 03:40 AM

Either bump your iso up a lot (should be able to get to iso 3200) or use flash. I agree with Marc that in few situations going wider than f2.8 makes your photos sharper, because while your shutter speed will get faster, your photo often looks softer due to narrow depth of field.

07-04-2011, 08:26 AM	#1
uiysses2004 New Member Join Date: Jul 2011 Location: Shanghai Photos: Albums Posts: 12	Da40 f2.8 I got a new DA40. but I don't know how to use at night or dark environment. any advice?

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07-04-2011, 08:42 AM	#2
Mr. B Senior Member Join Date: Jan 2009 Location: Varaždin, Croatia, Europe Photos: Gallery Posts: 295	What exactly is your problem?

07-04-2011, 08:52 AM	#3
uiysses2004 New Member Join Date: Jul 2011 Location: Shanghai Photos: Albums Posts: 12 Original Poster	Originally posted by Mr. B What exactly is your problem? the Pic is too dark and out of focus

07-04-2011, 08:54 AM	#4
uiysses2004 New Member Join Date: Jul 2011 Location: Shanghai Photos: Albums Posts: 12 Original Poster

07-04-2011, 09:06 AM	#5
alphanerd Senior Member Join Date: Mar 2011 Posts: 119	What shutter speeds are you shooting at? I assume that you're shooting wide open (f2.8), and you've increased your ISO; which camera are you using? Photography still requires some light, though If you're having problems focusing in the dark, maybe you need an autofocus lamp or a flash (which would allow you use a higher f number and get more in focus)? Are your subjects moving? Is SR on?

07-04-2011, 09:12 AM	#6
uiysses2004 New Member Join Date: Jul 2011 Location: Shanghai Photos: Albums Posts: 12 Original Poster	Originally posted by alphanerd What shutter speeds are you shooting at? I assume that you're shooting wide open (f2.8), and you've increased your ISO; which camera are you using? Photography still requires some light, though If you're having problems focusing in the dark, maybe you need an autofocus lamp or a flash (which would allow you use a higher f number and get more in focus)? Are your subjects moving? Is SR on? I am new Kr user. try to attach a photo.but failed, how to attached the photo?

07-04-2011, 10:14 AM	#7
Andi Lo Veteran Member Join Date: Jul 2008 Location: Halifax, Nova Scotia Posts: 2,924	Just upload the picture here and copy the [IMG] tags you get later from the website to the forum. ImageShack® - Online Photo and Video Hosting

07-04-2011, 02:21 PM	#8
Pentaxor Veteran Member Join Date: May 2009 Location: Vancouver, B.C. Photos: Gallery Posts: 6,513	wrong section.

07-04-2011, 07:21 PM	#9
Eagle_Friends Veteran Member Join Date: Feb 2010 Photos: Gallery \| Albums Posts: 971	um... you should do a search on google or something and learn how to utilize the dSLR body for dim-light situation (higher ISO, tripod, etc.) the 40mm f2.8 is a pretty fast lens, but it is not intended for low light shooting. For that, you should try getting a lens with an aperture of f2 or lower.

07-04-2011, 07:55 PM	#10
paperbag846 Veteran Member Join Date: Jul 2010 Photos: Gallery Posts: 2,395	Originally posted by Eagle_Friends the 40mm f2.8 is a pretty fast lens, but it is not intended for low light shooting. For that, you should try getting a lens with an aperture of f2 or lower. For his usage, I doubt a fast lens with slow AF would make matters better. Put the camera in "M" mode. Put the ISO up to the maximum value and shoot some photos. Set the aperture to 2.8. Press the green button. Shoot a photo. If the photo is still black, you are simply in too dim light. You should invest in a flash. Pr

07-04-2011, 09:07 PM	#11
Eagle_Friends Veteran Member Join Date: Feb 2010 Photos: Gallery \| Albums Posts: 971	Originally posted by paperbag846 For his usage, I doubt a fast lens with slow AF would make matters better. er... it would allow more lights in, so it would help? is he talking about astronomy photographs, or did i miss that part? i assumed that he was referring to typical day to day night shots like in a street or in a dimly lit restaurant or bar. If that's the cause, then something with a faster f-stop would definitely help.

07-04-2011, 09:52 PM	#12
paperbag846 Veteran Member Join Date: Jul 2010 Photos: Gallery Posts: 2,395	Originally posted by Eagle_Friends i assumed that he was referring to typical day to day night shots like in a street or in a dimly lit restaurant or bar. If that's the cause, then something with a faster f-stop would definitely help. In that case, yes, but lets be sure that its not just a setting issue and he would be fine with the 2.8 (i.e., not investing in faster glass). Besides, DSLRs just artificially bump the iso with ultra fast glass anyways due to the limitations of sensors. Aperture is really more about low DOF, not light gathering, below about f2.4. This is the reason that "M" glass underexposes at wide apertures.

07-04-2011, 10:02 PM	#13
uiysses2004 New Member Join Date: Jul 2011 Location: Shanghai Photos: Albums Posts: 12 Original Poster	Hi all tks for your suggestion. will try tonight.

07-04-2011, 10:12 PM	#14
Marc Sabatella Veteran Member Join Date: Sep 2006 Location: Denver, CO Photos: Gallery Posts: 10,685	Originally posted by Eagle_Friends i assumed that he was referring to typical day to day night shots like in a street or in a dimly lit restaurant or bar. If that's the cause, then something with a faster f-stop would definitely help. Somewhat, but you pay for that help in reduced DOF. I personally find f/2.8 the sweet spot.

07-05-2011, 03:40 AM	#15
Rondec Loyal Site Supporter Join Date: Mar 2009 Location: Gladys, Virginia Photos: Gallery Posts: 27,662	Either bump your iso up a lot (should be able to get to iso 3200) or use flash. I agree with Marc that in few situations going wider than f2.8 makes your photos sharper, because while your shutter speed will get faster, your photo often looks softer due to narrow depth of field.