Go Back   Team-BHP > Around the Corner > Shifting gears > Gadgets, Computers & Software


Reply
 
Thread Tools Search this Thread
Old 2nd April 2015, 13:31   #13576
Senior - BHPian
 
Join Date: Aug 2010
Location: Delhi
Posts: 2,098
Thanked: 979 Times
Default Re: The DSLR Thread

Now that Canon has bought Yongnu, we can expect a lot of budget flash systems to be available in India, with hope fully full warranty
https://fstoplounge.com/2015/04/cano...brand-yongnuo/
Aroy is offline   Reply With Quote
Old 2nd April 2015, 15:23   #13577
BHPian
 
gr8guzzler's Avatar
 
Join Date: Apr 2005
Location: Navi Mumbai
Posts: 648
Thanked: 38 Times
Default Re: The DSLR Thread

Quote:
Originally Posted by Aroy View Post
Now that Canon has bought Yongnu, we can expect a lot of budget flash systems to be available in India, with hope fully full warranty
https://fstoplounge.com/2015/04/cano...brand-yongnuo/
That was an April Fools Day joke bro...
gr8guzzler is offline   Reply With Quote
Old 2nd April 2015, 15:34   #13578
Team-BHP Support
 
Samurai's Avatar
 
Join Date: Jan 2005
Location: B'lore-Manipal
Posts: 22,045
Thanked: 13,496 Times
Default Re: The DSLR Thread

If you can't afford professional dSLR cleaning, there is always DIY cleaning. Apparently, the dynamic range and ISO sensitivity dramatically improves after such thorough cleaning.


Last edited by Samurai : 2nd April 2015 at 15:36.
Samurai is offline   Reply With Quote
Old 2nd April 2015, 16:16   #13579
Senior - BHPian
 
sdp1975's Avatar
 
Join Date: Aug 2009
Location: Bangalore
Posts: 1,573
Thanked: 880 Times
Default Re: The DSLR Thread

Yongnuo has made a replica of the Canon 50 mm 1.8 for $ 60 :d.

Reviews on the net are quite positive.
sdp1975 is offline   Reply With Quote
Old 2nd April 2015, 19:46   #13580
BHPian
 
raghu.t.k's Avatar
 
Join Date: Nov 2007
Location: Chennai
Posts: 446
Thanked: 161 Times
Default Re: The DSLR Thread

Quote:
Originally Posted by Samurai View Post
If you can't afford professional dSLR cleaning, there is always DIY cleaning. Apparently, the dynamic range and ISO sensitivity dramatically improves after such thorough cleaning.
Infact it would have been better if he had used Harpic concentrate instead of liquid soap. I am not sure why this exhaustive cleaning. Also noticed the lens had a red ring, and if its aL series!!
raghu.t.k is offline   Reply With Quote
Old 5th April 2015, 21:36   #13581
Distinguished - BHPian
 
condor's Avatar
 
Join Date: Jun 2006
Location: Speed-brkr City
Posts: 10,322
Thanked: 3,665 Times
Default Re: The DSLR Thread

Feedback, pls : Is this image sufficiently clear ?

The DSLR Thread-auto100crop.jpg

100% crop image, taken from 6th floor.
Lighting wasn't great
Aperture mode - f5.6
Focal length - 20mm
condor is offline   Reply With Quote
Old 5th April 2015, 23:47   #13582
Senior - BHPian
 
NetfreakBombay's Avatar
 
Join Date: Jan 2008
Location: Bombay
Posts: 1,375
Thanked: 315 Times
Default Re: The DSLR Thread

Quote:
Originally Posted by condor View Post
Feedback, pls : Is this image sufficiently clear ?
No, Auto is not clear. Relative to size of auto, number plate is large enough to be legible. A sharp image should have clear number plate at this size.

Similar issue with faces.

Thinking aloud....

Issue with this image might not be due to lens at all. To troubleshoot:

1. Use a tripod to eliminate camera shake
2. Try manually focus to eliminate focus issue (live view + magnification might help)
NetfreakBombay is offline   Reply With Quote
Old 6th April 2015, 06:28   #13583
Distinguished - BHPian
 
condor's Avatar
 
Join Date: Jun 2006
Location: Speed-brkr City
Posts: 10,322
Thanked: 3,665 Times
Default Re: The DSLR Thread

Actually, let's make that 7 floors worth of height. To put things in perspective, here is the full image:

The DSLR Thread-full_0019.jpg

Focus point is in the blue sheet (just right of centre of the sheet)
Hand held
Expsoure: 1/15

Note:
This image is auto-adjusted. The cropped image above was not.
Quote:
Originally Posted by NetfreakBombay View Post
No, Auto is not clear. Relative to size of auto, number plate is large enough to be legible. A sharp image should have clear number plate at this size.
Do you have any pics that you have taken at that focal length & distance for comparison ?

Last edited by condor : 6th April 2015 at 06:50.
condor is offline   Reply With Quote
Old 6th April 2015, 10:41   #13584
Senior - BHPian
 
NetfreakBombay's Avatar
 
Join Date: Jan 2008
Location: Bombay
Posts: 1,375
Thanked: 315 Times
Default Re: The DSLR Thread

Quote:
Originally Posted by condor View Post
Focus point is in the blue sheet (just right of centre of the sheet)
Hand held
Expsoure: 1/15
I think that might be the reason:

1. Focus is not in the area of Auto
2. Handheld + 1/15 second exposure

Even a very minor shake will move numbers in auto by quite a few pixels at distance of ~200 feets (triangulate based on height of 7th floor + assumed distance of 150 feet from building). That would make picture soft or noisy.

Can you try cropping the part where lens was focused.

I will try a similar photo. Would be interesting to see if number plates show up in 100% crop with similar distance. I think tripod should do the trick since the subject is stationary.
NetfreakBombay is offline   Reply With Quote
Old 6th April 2015, 11:12   #13585
BHPian
 
Join Date: Nov 2009
Location: Bangalore
Posts: 604
Thanked: 186 Times
Default Re: The DSLR Thread

@condor - Sharpness of most lens tend to fall off from center to edge. So what you are seeing is not unusual. Pricier lenses tend to be sharp all across the frame. Ofcourse, using a tripod helps improve sharpness all across.

Last edited by WindRide : 6th April 2015 at 11:13.
WindRide is offline   Reply With Quote
Old 6th April 2015, 11:30   #13586
Senior - BHPian
 
govigov's Avatar
 
Join Date: Oct 2007
Location: Cochin!!!!!
Posts: 1,271
Thanked: 382 Times
Default Re: The DSLR Thread

100% crop of the center with a center cross point as the point of focus usually tells us if the lens is sharp or not.

Also, watch this review -
govigov is offline   Reply With Quote
Old 6th April 2015, 11:30   #13587
Team-BHP Support
 
Samurai's Avatar
 
Join Date: Jan 2005
Location: B'lore-Manipal
Posts: 22,045
Thanked: 13,496 Times
Default Re: The DSLR Thread

Quote:
Originally Posted by condor View Post
Do you have any pics that you have taken at that focal length & distance for comparison ?
Well, I have a pic taken at 12mm (24mm effective), you can read the number plate of the Jeep parked on the extreme left side.

http://photos.smugmug.com/photos/i-c.../i-cxqf63N.jpg
Samurai is offline   Reply With Quote
Old 6th April 2015, 12:30   #13588
Distinguished - BHPian
 
condor's Avatar
 
Join Date: Jun 2006
Location: Speed-brkr City
Posts: 10,322
Thanked: 3,665 Times
Default Re: The DSLR Thread

Quote:
Samurai (The DSLR Thread) : Well, I have a pic taken at 12mm (24mm effective), you can read the number plate of the Jeep parked on the extreme left side.
Horizontal distance here is approximately what I had, but jeep was pretty much at eye-level here, unlike the 7th floor view that I had in the pic that I posted.
condor is offline   Reply With Quote
Old 6th April 2015, 12:34   #13589
Senior - BHPian
 
sdp1975's Avatar
 
Join Date: Aug 2009
Location: Bangalore
Posts: 1,573
Thanked: 880 Times
Default Re: The DSLR Thread

@condor, try out different lenses to see if its a lens related problem. Try focusing using live view, is the sharpness better than using the usual phase detect on DSLRs ?

Sticking a newspaper on a wall and shooting it might also help. You need to shoot at sufficient low shutter speeds, or use a tripod to rule out camera shake.

Read also https://photographylife.com/how-to-q...tofocus-issues
sdp1975 is offline   Reply With Quote
Old 6th April 2015, 12:45   #13590
Senior - BHPian
 
NetfreakBombay's Avatar
 
Join Date: Jan 2008
Location: Bombay
Posts: 1,375
Thanked: 315 Times
Default Re: The DSLR Thread

Quote:
Originally Posted by condor View Post
jeep was pretty much at eye-level here, unlike the 7th floor view that I had in the pic that I posted.
This pic is also shot at a much higher speed (1/200). That would have also helped with sharpness.
NetfreakBombay is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
DSLR Video Discussion Sankar Gadgets, Computers & Software 129 18th August 2017 19:07
On a Temple Visiting Spree! Returned with only 1 wish. Need a DSLR! mclaren1885 Travelogues 23 27th July 2007 11:21


All times are GMT +5.5. The time now is 21:33.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks