Sunday, July 22, 2012

Vibration Compensation on a tripod

It is popular knowledge that if you are shooting with a tripod, you should turn off VR on your Nikkor lens.  I have shot on tripods with my Nikkor lenses and even if I forget to turn VR off, the result is not bad--perhaps a slight blur that I don't really notice.  However, if you use a Tamron 17-50mm f/2.8 VC lens, beware of the VC on a tripod!  You must turn it off.

Here is a crop of a photo of the skyline of Toronto on a hazy night.  Except for the crop, the photo is unaltered in any way.  You can see these diagonal streaks of light and ghost images.  Well, that was VC at work.


I believe I wrote about this a long while ago but it was obvious I forgot about VC's issue on a tripod.

Saturday, July 7, 2012

Manfrotto MKC3-P01 tripod

So, my trip to Nova Scotia is over and I had a chance to take the Manfrotto MKC3-P01 tripod along.  I have to say I like this tripod a lot.  It is definitely not as sturdy as my Opus tripod but it is hiking-friendly.  I did a number of hikes in a couple of national parks and roamed around towns and cities carrying the tripod on my bag or holding it in my left hand.  I'd give it a good plus for being lightweight.  Because it was light, it was more likely that I would take it along on a long hike and it was worth it.  It got me some pictures I wanted.

The tripod is simple.  It has a ball head and four leg segments.  The ball head was useful to have.  I can make minor correction to the camera angle for composition.  However, I found it hard to adjust the camera for portrait shots.  The camera was heavy and would sag quite a bit after I locked down the tripod.  I would then have to compensate by either adjusting the tripod legs or readjust the camera on the ball head.

Notwithstanding these above issues, I give this tripod two thumbs up!

Water in your lens?

I was on my fifth day of a nine-day trip in Nova Scotia when I found out in the morning that water had condensed on the inside of my Nikkor 18-200mm lens.  The condensation sat on the glass elements as tiny water droplets.  Through the viewfinder, it was like looking through thick fog.  There was no way to shoot through it!

That was totally my fault.  The day before, rain was pouring down like cats and dogs and knowing my lens was not water resistant, I still went out and took pictures in the rain.  The air was moist and rain was beating on my camera body and lens.  I did not care so much about the camera as the D7000 is supposed to be somewhat weather sealed.  However, I did not take the same precautions I used to take with my lens.  Before, I would shoot in the rain but would always have a plastic cover to protect the lens.  I did not have anything this time around.  So, what happened?  Slowly, water got it into two chambers of the lens barrel!

I was quite mad when I realized I could no longer use the lens.  I brought two others lenses along but this 18-200mm was my primary, all-purpose lens.  On my drive from the Fundy National Park (in New Brunswick) to the Confederation Bridge, I started to think how I could get the moisture inside the lens out.  It would be nice to have a vacuum cleaner of some sort and suck all the moisture out, but it would not be that easy anyway.  Well, as luck would have it, the sky had cleared up, the sun was out, and the air was dry.  Inside my car, without air circulation, it would take a minute or so to feel the temperature rise.  I had an idea.

The lens can zoom in and out, so it has to draw air in and out.  When the lens zooms in, the barrel extends out, air is pulled in.  When the lens zooms out, the barrel retracts, and air is pushed out.  I let the temperature in my car rise.  It became warm and dry, perfect for drying out the inside of the lens!  I simply ran the lens through a couple of dozen zooming motions.  As I retracted and extended the lens barrel, I could feel and actually see moisture collecting on the outside of the barrel, drawn from inside lens.  I could clearly see the condensation inside the lens thinning out slowly, so I kept on zooming in and out until the inside lens elements were clear again..

I was so relieved the lens became usable once again.  A lesson learned.

Invasion of What?

What are these bugs? I've never seen them before. I saw them at my parents' place the other day. Lots of them in soil or grassy areas.