Saturday, January 17, 2009

Color Temperature: Halogen, Fluorescent, Incandescent, Daylight and Combined Lighting

As i've just bought a remote control for my Nikon D80 plus a light tent to make my own cheap table top studio combined with amy table halogen lamp and tripod.


This time, i appreciated setting my camera's color temperature to achieve white balance using halogen continuous lighting not possible with my old Canon EOS 300D camera (walang K)

Color temperature settings I googled and experimented on:

Daylight:5500 degrees Kelvin
Fluorescent: around 5500 Kelvin degrees
Tungsten: 2700-2800K
Neodymium lamps: around 3000 Kelvin degrees
Halogen lamps: 2800 to 3400 K

Notes:

An 80B filter converts 3200K light to 5500K. You'll need a combination of an 80B with an 82A to correct the light from a household bulb to approximate 5500K.

correction filter for use of daylight films with halogen lamps is the 80A.
Light bulbs, a stronger blue filter, a 80B

Incandescent includes tungsten, neodymium, halogen

As Tungsten Incandescent bulbs age the color temperature gets continuously lower (more red/yellow); not the case with Halogen lights. Dimming either type of light shifts the color temperature downward (becomes more red/yellow)

I wonder what's the setting for white balance when doing underwater photography :P

Friday, January 16, 2009

Air21 Door to Door Delivery

I ordered a few items from an online store in Binondo selling photography equipment

Haida IR filter,
photobox (light tent)
and remote control for my Nikon D80

i requested them to be sent to me via courier after depositing the payment to their bank account.

The items were delivered to me the following day for P168 fee.
the 168 is ominous probably for the Chinese who sent the items to me. I still have to test the items though particularly the remore control and the Haida IR filter

It seems Air21 is cheaper than LBC...there's an LBC branch near my home but i didn't like the attitude of the people there, too indiferrent and don't know how to smile.

Monday, January 05, 2009

How to Block Blog Comment Spam Tips for Blogger/Wordpress

On December 30, 2008, while I was on blog holiday, a spammer went on a spamming frenzy on this blog to comment on a lost cause and probably to catch my attention on something "remarkable"

The spammer spent about 3 hours to post the same comment on almost a hundred posts of this blog...

Tips to avoid Blog Comment Spam:

1. Enable Word Verification, technically called Captcha, effective in weeding out spambots (automated spamming scripts) from humans.

2. Consider moderating comments. It's better than allowing all comments then delete later for greater control. Enabling comment moderation can make do without Word Verification but the latest spammer here indicated I could have slowed the spammer down with the captcha.

3. Look for anti-spam plugins (for wordpress and other blogging platform) but like other anti-spam tools, you need to review the spam filder for false-positives.

4. Disable comment box or disallowing comments. I did this for the most spammed post in this blog.

5. Try to block the IP address of the spammer if using a static IP address.

6. Try to contact the ISP of the spammer for abuse i violation of their Acceptable Use Policy (AUP)

you want to know who's spamming me? they're guys/agents of Fern-C on a spamming frenzy!

about the spam deluge, the spammer's effort of 3 hours spamming comments, stole about three minutes of my time deleting them. I don't want to waste more time reading a "press release" as if it will change anything. I just want them to stop doing those deceptive sales presentation of theirs.

Thursday, January 01, 2009