Basic Digital Photography class week 3

March 8th, 2010

Tonight’s class was all about the differences between Aperture Priority and Shutter priority. I still have not received an answer on how to get auto-focus to work with live view. Anyone that knows how to do this on a Canon Xsi, please let me know.

The other stuff we talked about was how to eliminate blur. Blur can happen for two main reasons. The first is camera shake. This is caused by the photographer not being able to hold the camera still during the shot. The best way to eliminate camera shake is to make sure your shutter speed is fast enough. Using the formula

shutter speed = 1/(focal_length * crop factor)

Each camera has it’s own crop factor. Some common crop factors are:

Canon = 1.6
Nikon/Pentax/Sony = 1.5
Olympus = 2.0

So if you were shooting with a focal length of 100mm on a Canon your shutter speed would need to be at least 1/160 so you would have to use 1/250. As you change the focal lengths you run into a problem with not having all of the aperture openings available (Unless you have a fixed aperture lens, which are pricey). So it may not be possible to get the shot with the shutter speed. You may have to increase ISO, which we learned is bad, or put the camera body on a tripod of fixed surface. (remember to turn off image stabilization when you do this).

The other cause of blur is due to motion of the subjects. There are three factors that you have to take into account for this:

1) Speed of the motion of the subject. A slow moving subject will produce less blur than a fast moving subject.
2) The direction of movement of the subject. A subject moving away or towards you will have little blur while a subject moving across your field of vision will have the most blur.
3) The distance from the subject. A subject very close will produce more blur while a subject in the distance will have little or no blur.

One other subject we discussed was Depth of Field. Aperture settings can significantly effect DoF and focus of your subjects are impacted based on focal length and aperture settings. There are a ton of free and for-fee programs that will help you figure out DoF. There are three free ones available on the iTunes store.

My first real mod.

March 8th, 2010

OK, so it’s not really my 1st, but my third. The 1st modification was to add a louder horn and the second was to add a new variator and exhaust system. Those two modifications really were done by others on my bike. This is the 1st modification I have done all by myself.

I was trying to come up with a way to do a clean installation of a garage door opener for my bike. All of the options I found required you to tie into your electrical system or were kluges. I considered just buying a spare remote and making a housing for it, but the price would have been about $50 for just the parts.

I was searching amazon when I ran across the following item:

http://www.amazon.com/gp/product/B000Q60Z4O/ref=oss_product

This looked to be the perfect item. I ordered it and it arrived two days later. I opened the package and examined the parts. It was indeed well made. The receiver was a snap to install as my garage door wall remote has exposed terminals for this exact type of install. I then set my sites on installing the transmitter. This is when I discovered a problem. The screw that holds the transmitter on the handlebars was stripped. There was no way to remove it, without destroying the screw. Arg!

I examined the unit more closely and saw that it was held together with two nuts. I  disassembled the unit. This proved easier than I thought. Once I had the unit apart I decided that I wanted to do a clean mount into the dash. The fluid panel on the left side of the dash seemed the most likely place to install the unit. I removed the panel and drilled two 7/24 holes. Starting with a MUCH smaller bit and working my way up to not damage or oversize the hole.

After the holes were drilled I installed the trigger and the LED status light. There was a metal flange that holds the parts together. I reused this part and re-assembled the unit. The only problem I ran into, was that the thickness of the fluid cover was more than the metal holder it shipped with. I was unable to reuse the lock-washer because of the thickness.

The install appears to have come out nice and clean. My next challenge was where to mount the transmitter and how to route the wires. The pack was too large to store in the fluid container, so I decided I would mount it underneath. This would require cutting of the wires. I would be unable to drill a hole through the container large enough to put the pack through and I wanted a solution that would allow me to remove the transmitter (to change the battery) without having to disassemble the trigger and lights. (too many little parts to loose).

I searched for quick release connectors and found the following Molex connectors. http://www.mouser.com/molexminifith2O/ These looked to be perfect and are also waterproof. It took me a long time to find a vendor that carried them and would sell them in small quantities.With parts on order, I waited.

The parts finally arrived. The connectors were a bit bigger than I expected, but when I examined them, I saw how well made they were and decided to use them. I assembled the connectors. If you do not have a Molex tool for inserting the pins, you will need to completely disassemble the back of the connectors (removing the rubber gasket). This is not at all difficult, but just requires some patients and a light hand on the pliers to remove the plastic tabs.

Warning! Do not cut the wires with the receiver plugged in. It will trigger the remote and your garage door will go up or down, depending where it was. While working on the transmitter, it is best to unplug the receiver.

Now that I had the connectors attached and tested I set to the task of drilling a large enough opening. I started with a small bit and made many little cuts. This allows me to take my time and not over cut. Unfortunately, I had to make the opening a little larger than I wanted to because of the curve of the  basin. It was really difficult to cut straight, so it looks a little shabby. The first image below shows the opening from the inside, while the second shows from underneath. I plan to use a file and clean up the sharp edges later.

Once the hole was drilled I needed to find a decent place to mount the transmitter. There was a perfect flat spot up at the top. I decided to mount it there. I tried using the sticky tape that was provided with the unit but it just would not hold. I also tried to use contact cement and while it held very well to the plastic it would not adhere to the Velcro.

I gave up on that location (at least until I find a better adhesive. I tie-wrapped the wires and connectors to the wiring harness underneath so that it would be out of the way.

The above picture shows where I would like to eventually mount the transmitter, but until I address the adhesive issue, I have tie wrapped it to a solid piece of metal just in front of the hydraulics. I didn’t take a picture of that, sorry!

The only thing left to do at this point (besides the adhesive) is to get a rubber gasket and clean up the opening I drilled in the fluid overflow basin. Here is a photo of the finished project.

The entire cost of the project so far:

Remote $25
Connectors: $16

I expect the gasket to cost between $2 and $5 depending on where I find it.

Beware the Ides of March

March 3rd, 2010

I have been extremely lucky due to diligence and common sense when purchasing on the Internet. Today, I was going through my old receipts and discovered an order I had placed on March 14th 2009 that never arrived. I purchase a lot of items and it’s hard to keep track of what I bought and what has arrived. Having a checklist of things ordered really helps.

The company in question is called lidomounts.com and they appear to be a legitimate site that sells mounts for all sorts of vehicles. I had purchased a mount for a garmin nuvi for a motorcycle. Well it turns out this company is fraudulent. There appears to be a lot of postings about them, unfortunately it was all posted AFTER I made my purchase.

I looked online with my credit card company to dispute the charge. I was unable to find the charge on my statement so I called. There was no record of the charge. I got lucky… Apparently, their merchant account cut them off and my charge never went through.

I have tried to contact them to give them the benefit of the doubt, but nobody responded to voice mails or emails sent. The only real information I found was through the domain registration, but nobody at those numbers returns calls.

Registrant:
Lass Inc
4365 Farmdale Ave.
Studio City, CA 91604
US

Domain name: LIDOMOUNTS.COM

Administrative Contact:
Newcomb, Jim  lidomarketing@sbcglobal.net
4365 Farmdale Ave.
Studio City, CA 91604
US
+1.8187540292
Technical Contact:
Com, Web  info@web.com
6 Bethel Blvd.
Bethel, CT 06801
US
+1.2034482021    Fax: +1.2034482022

Basic Digital Photography class week 2

March 2nd, 2010

My second week of our basic digital photography class. We talked about work flow.

We discussed the process flow that you should follow. While this may seem really simple, it is good to have a checklist. The following steps are suggestions to help you not forget a step.

Step 1: Shoot your photos (Duh)
Step 2: Remove the card from the camera. (Do not use the usb cable. It has issues with power loss that could create issues)
Step 3: write protect your card (VERY important to prevent the computer from corrupting the card if a problem occurs)
Step 4: Put memory card into computer via a card reader
Step 5: Transfer photos to your computer (Preferably by hand, but use your transfer software of choice that can organize your photos by your own preferences). There is much debate on the proper way to do this. Do what works for you.
Step 6: Remove the memory card from the computer. (Did you eject or just yank it? This is why you write protect. Yanking the card can cause data loss)
Step 7: Double check that your photos are on your computer. (Do this with the card out to make sure your not looking at the card instead of the hard drive)
Step 8: Backup your files (Do this before working on your photos.)
Step 9: Put the card back in the camera.
Step 10: Reformat the card in the camera. (This will format it with the folders/format that your camera requires.)
You want to do steps 9 & 10 so that you know your card is blank and is ready to use again.

As part of your post-processing you should rate your photos. In your software like lightroom or iPhoto or aperture you should use the star rating system. Don’t spend time on your photos until you have rated them all. This will allow you to go over all the photos before you start spending hours of time on a single photo.

We learned a lot about the auto focus settings on the camera. I am still trying to figure out how I can use live view and auto focus at the same time.

Our assignment for this week is to use our built-in light meter and take a portrait photo of a human subject. Any volunteers?

a lovely day in paradise.

February 18th, 2010

I couldn’t take it anymore! I have been couped up in the house for too long and decided it was time to get out and explore the south-east part of San Diego county. I have been wanting to ride out east and up the Sunrise Highway. I planned a route and headed out this morning. I stopped for gas (to top off the tank) and hit the market for some food to eat for lunch.

I headed out the 52 freeway, to the 125 and then the 94 east. This was the only place I had traffic. Once the 94 freeway ended it turned into a nice rural road. I had to pay attention to the signage (which was really good along the route) I headed out the 94 for a lovely view of the east county. I passed through areas I had only heard about (mostly during fire season). The most interesting things to see along this route are the valleys the the road cuts through. Also, as you enter campo you can see the train tracks for the short line. I highly recommend taking a weekend trip on their train. Along the route, there is a border checkpoint. When I stopped the officer didn’t wave me through, in face he didn’t even look at me. I raised my visor and asked if everything was ok and he looked up and said “I’m sorry, we have never seen anything like this before.” I laughed and he waved me on. about 6 other officers were there checking out the ride. I would have stopped and given them a tour, but cars started to bunch up behind me 🙁 Next time.

As I left campo, I reached the start of the S1. This started as part of the old highway 80 and it paralleled the I8. When it crossed the I8 freeway, it turned into S1 and I started my climb up the mountain. The ride up the mountain is fantastic. The road is in great shape and the views are incredible.

When I got above the 5000′ level the temp dropped from the comfortable 70’s to the low 60’s and ever few miles it dropped another degree. I then started to see snow! Wow, to go from mid-70’s to snow in less than 20 miles! This is why I love San Diego!

As I climbed higher, the temp kept dropping. Finally reaching 54 degrees. Not bad, but too cold for what I was wearing. I had planned to stop at the summit and have lunch, but with all the snow and low temps, I decided to push on. As I started down the other side of Mt. Laguna I noticed a lot more snow. The north side definitely is colder than the south side. Once I descended below the 5000′ level the snow thinned out and you could see the burn area from the fires a few years ago.  I decided to stop at one of the overlooks for a water break. I passed a bicyclist on the way down. She was moving a good pace but must have been freezing. She passed me at the rest stop doing almost 30 mph down the hill. When I got started again, it took me almost 15 minutes before I passed her again.

I made it down the mountain and headed into Julian. Julian was crowded today. Lots of people and cars lining the streets. It actually seemed more crowded than on a weekend. I headed out of Julian and stopped at the picnic area just outside of the town. I ate my lunch here watching the cars come down the mountain. There was a worker here building picnic table covers out of wood. There was a tent pitched here, so I assume he was camping on the site. A very interesting arrangement.

After eating lunch, I headed into Romona and gassed up. I decided to head down San Vicente Canyon towards Barona. I had never driven this road and I am glad I double checked my map, because it is not labeled San Vicente from the 78. It’s tenth street.

I winded south through Romona and into the Indian Reservation. This was also a lovely drive through this area. The casino here is amazing. The last time we were here, it was a tent. Now, they have a huge hotel and the roads are all straightened out and widened.

I then headed down through wild-cat canyon. Another area I have not been to and only heard of from the fires. This area is basically a canyon with a lot of homes and horse corals down in the canyon. As I exited the canyon, I headed back to the 67 and civilization and headed home out mission gorge and the 52.

I can’t wait to do this ride again, especially with Angie and others. Hopefully, we can go again towards the end of the month.

Here is the link to my bim log:

Campo/S1 Ride

Campo/S1 Ride