Category Archives: Discussion

A couple of years ago I wrote How to take a picture of the moon.   It was, as you might guess, a lesson on how to take photos of the moon with your dSLR.  You may all now compliment me on my creative and clever naming scheme– I spent hours wordsmithing that one.  It’s my masterpiece.

In it I wrote “The first thing you want is the longest telephoto lens you can get, so that the moon looks like something other than a white dot. 200mm is about the shortest, 300mm is better, and 500+ is even better than that.”  That’s a true statement, but it lacks any substantiating evidence.  As you know, I’m a huge fan of experimentation and examples.  You can probably guess that a longer lens is better for shooting a far-away object, but how much better is it?

A few months ago, my friends at the absolutely fabulous equipment rental company BorrowLenses.com had a crazy sale on super telephoto lens rentals, so I did something I’ve wanted to do for a long time– I rented an obscenely large lens.  Specifically, I picked up the Sigma 800mm f/5.6 super-telephoto lens.

If you’ve never seen an 800mm lens, you should.  This beast is almost two feet long, about six inches across at the front element, and weighs in at a whopping 13 pounds.  It comes in its own well-padded metal carrying case and a sherpa to carry it, and has its own gravitational field.  OK, I made up the part about the sherpa, but it should come with one.  Maybe my trusty Gitzo tripod needs a name?

In any case, the moon.  I timed my rental so that it coincided with the next full moon.  I had an evil plan!  My plan was to steal a bunch of photons from the moon so that I could show you, dear reader, what the moon looks like when captured with various focal lengths of lens.

In order to do this, I packed the following gear:

• My trusty Canon 5D Mark II
• The abovementioned Sigma beast
• Canon 70-200 f/4L IS
• Tamron 1.4X pro teleconverter
• Tamron 2X pro teleconverter
• Tripod
• Cable release

My plan was simple: I would set up the tripod and shoot the moon with various combinations of lenses and teleconverters to show the image size of the moon with each combination.  For example, I could use the Canon lens at 200mm, and then add a 1.4X teleconverter to show what it looks like at 280mm.  Then I could do it with the 2X teleconverter to show 400mm, and finally with the two teleconverters stacked to show 560mm.  Stacking teleconverters really isn’t a good idea, since it causes your images to get all soft and cuddly, but it’s certainly OK just for demonstrating what the focal length looks like.

When you look at these images, bear in mind that they’re taken with a full-frame camera.  If you have a cropped-sensor dSLR, as most people do, imagine that at portion of the outer edge of each image has been cut off.  This Wikipedia image has a pretty good comparison of sensor sizes.  Look at the APS-C for Canon or Nikon, and that’s about how much you would cut off the edge of my images to get them to look like yours.  All of these images have a full-size version available if you’re logged into Flickr.

	200mm
	280mm = 200mm +1.4X teleconverter
	400mm = 200mm +2X teleconverter
	560mm = 200mm + 2X teleconverter + 1.4X teleconverter
	800mm
	1120mm = 800mm + 1.4X teleconverter
	1600mm = 800mm + 2X teleconverter
	2240mm = 800mm + 2X teleconverter + 1.4X teleconverter

As you can see, longer lenses bring the moon in closer. Even 2240mm doesn’t quite fill the sensor on a full-frame dSLR, although about 1600mm would do so on a cropped-sensor camera.

That doesn’t tell the whole story, though– you don’t have to fill the whole frame in order to get a decent photo of the moon.  If you click through and look at the full-size image taken at 400mm, you’ll see that it has a fair bit of detail in it.  Still, when it comes to shooting the moon, longer is better.  This is one case where size really does matter.

If you decide you want to rent a long lens and try it yourself, I heartily recommend BorrowLenses.  The Sigma that I rented is pretty expensive unless you have other uses for it, but I heartily recommend the Canon 400mm f/5.6L for shooting the moon.  It’s quite reasonably priced for the focal length, and it has very good image quality.  Add a 1.4X teleconverter to it if you need additional length.  It’s also a lot easier to wrangle than the beast.

There are a couple of other things to know.  You really want to use a tripod, or something else to stabilize your camera, when you’re working with long lenses.  This will keep your images from having ugly camera shake.  The downside of this is that the moon moves pretty rapidly through the sky, so if it’s been a couple of minutes since you aimed the camera you’ll probably need to look through the viewfinder again and see if the moon is still in the frame.    Also, working with long lenses can be its own challenge.  One technique is to rest your hand on top of the lens, just above where it sits on the tripod.   This article explains it, and has a great illustration too.

Now what are you waiting for?  Go shoot the moon, and share your images with us.

I’m a gearhead, and always have been.  It’s an engineer thing, I guess, but photographic equipment is inherently interesting to me.   I like playing with different kinds of equipment, and experimenting with new techniques.  I also find myself wanting for specialized equipment from time to time, such as a very long telephoto lens.

A few weeks ago I decided that I was curious about tilt-shift photography.  It’s a fairly esoteric type of photography that’s used for architectural photos, landscapes, and special focusing effects.  Tilt-shift lenses are expensive, though– the cheapest Canon, the TS-E 24mm f/3.5L, runs around $1200 mail-order.  That’s a lot of money for something I probably wouldn’t use very often, and it’s way more than I’m willing to spend on my curiosity.

What’s a budget-constrained gearhead to do?

For about $50, I could rent the TS-E 24mm for a week, and I did.  None of the photos that I took with it were terribly interesting, but that wasn’t my goal.  I really just wanted to play around with it and get a better understanding of how tilt-shift photography worked.  Buying a lens for that purpose would have been cost-prohibitive, but renting was an affordable alternative.

Renting equipment is a great way to try something out before you buy it.  Do you really want that specialized macro lens, or a fisheye?  Rent it and try it out  before you plunk down a lot of cash.  Lenses are the most common things to rent, but you can also get camera bodies, lighting equipment, tripods, and more.  I discovered my favorite tripod by accident, when I rented it for a weekend.

I especially like rental for long telephoto lenses, since I don’t need one very often and they’re terribly expensive.  My next rental will be the Sigma 800mm f/5.6 super-telephoto lens.  I have it reserved for pickup next week, and I’ve timed the rental so that it occurs during the next full moon.  If all goes well, I’ll be updating “How to take a picture of the moon” with some new examples.  Wish me luck!

So maybe you want to rent equipment yourself.  How do you do it?

Most big cities will have at least one camera shop that rents equipment.  Check your local yellow pages, call around, or search the web to see what you can find.  The advantage of this is that you can often pick something up immediately.  Supporting your local camera shop is also worthwhile.  The downside is that local rentals have a tendency to be a bit on the expensive side.

Another option is one of the internet-based rental houses.  Several of them have sprung up in the last couple of years, and I’ve personally done business with a few of them.  They have their inventories online, and ship equipment to you when you rent it.  You keep the packing materials, and at the end of the rental period you repackage the gear, put the return shipping label on the package, and send it back.  Doing this takes longer than renting locally, but you often get a better selection of equipment than you can get locally, and the prices are better.

As I said, there are quite a few different internet-based rental companies.    All of the ones that I’ve done business with have been very good, but I’m particularly enamored of BorrowLenses.com.  They have an excellent selection, their prices are competitive, and I’ve gotten spectacular service from them.  Additionally, they are local to the San Francisco bay area, which is a huge advantage for me– I can order things online, then swing by their shop and pick it up, thus saving myself shipping charges.  I even enjoy their Twitter feed, which contains interesting information for photographers as well as occasional sales.

Rental is a great option for short-term needs, trying something out before buying it, or just playing around.  I highly recommend it as an alternative to buying.

I just finished packing my camera bag for a shoot, and as I chose gear I thought about how packing gear was an interesting reflection of a photographer’s maturity.

Novice photographers carry everything they own.  At first it’s easy, because they probably have one camera and one lens, and leaving either of those behind doesn’t make sense. Very quickly they add accessories, and those always go in the bag.  And then they get a second lens, and maybe a third, and they get a bigger camera bag to carry everything.  I confess that I have a behemoth camera backpack that I use fairly often.

After a while a photographer either accumulates too much equipment or comes to his senses (or both) and realizes that he doesn’t need every single piece of gear he owns with him every time he takes a picture.  Often this is caused by the sheer impossibility of carrying everything he owns, but it’s still an important growth step.  The photographer is now planning his shoot before he goes out, so that he can carry what he needs.  OK, often it’s so that he can leave behind what he’s sure he doesn’t need, but it’s still progress.

The third stage of maturity comes when the photographer packs carefully for a shoot, uses every major piece of gear he packed, and doesn’t wish for anything that he left behind.  This means that not only is he thinking about what he needs for the shoot, but he’s predicting correctly.

I’m about a 2.3 right now– I plan carefully, and sometimes get it right.

How about you?

As I said in my last entry, I get a lot of questions from a lot of people who want to upgrade their dSLRs.  These people often have the vague notion that a better camera will take better pictures, but that’s often not the case.  As we’ve already seen, expensive cameras aren’t filled with Magic Crystals that cause the camera to take perfect pictures.

This particular series of articles was triggered by a reader named Erin, who asked me the following question:

This has been a great information source for me thank you so much! I feel I am at the max on my newbie camera (Canon Rebel XTi) and need to get a more sophisticated camera now – scary thought :( but I am glad I am realizing the limitations, it shows I am learning something. Do you have any recommendations for the next step camera?

We had a good discussion about it, which you’re welcome to read for yourself if you’d like.   Like many people, I suspect that Erin was vaguely expecting that I would recommend the Cakon D283M20LMNOP as the perfect upgrade from her XTi.  Instead, I responded by asking questions.

When people want to upgrade their camera bodies, I generally try to talk them out of it.  As I said in my last entry, the quality of a photographer’s images are far more dependent on the skill of the shooter and the lenses used than they are on the camera body.  I would hate for someone to spend a lot of money on a new camera only to be disappointed that they didn’t get a miraculous improvement in their images.

Does that mean that you should never upgrade your camera body?  No way.  I’ve done it twice since I bought my first dSLR, and I haven’t regretted either one.  I generally ask potential upgraders one major question, and that question is big enough that I’m going to ask it in bold:  In what way are you feeling limited by your current camera?

What I’m looking for in the response is for them to articulate a concrete reason or reasons why the current body is holding them back, and then why a new body would help them overcome that hurdle.  There’s no right or wrong answer except for vague, fuzzy notions about better pictures.

Here’s the story of my first dSLR upgrade:

It’s 2 a.m.  I’m standing on top of a hill in Henderson, Nevada, trying to get the perfect panoramic image of the Las Vegas skyline.  I’ve been playing in the World Series of Poker for two days straight, and I’m exhausted.  I’ve also just made some money in the event, so I have about ten grand burning a hole in my pocket.  It’s surprisingly cold for June.  It’s windy.  I’m freezing my butt off, and I really just want to get the shot so I can go to sleep.  Because it’s a panoramic image with lots of shots, I have the camera in manual everything mode, including manual focus.   This should be easy– I level and align the tripod, focus, set the exposure, then just rotate the camera while taking a sequence of exposures.  I’ve done this dozens of times, and I can do it in my sleep.

Well, except for one thing.  I can’t focus!  I was using a Canon Rebel XT, and that camera has a viewfinder that wants to be postage-stamp sized when it grows up– it’s really tiny.  I have a very clear memory of watching the red neon on the side of the Rio swim before my eyes, and I just could not get it to focus.   I’m generally an extremely calm person, but I quite literally found myself yelling obscenities at the camera, and barely managed to keep myself from throwing the camera over the side of the ravine.

I bought a 5D about 12 hours later, and I have no regrets.

When you read that story, can you see where I was feeling limited by my body?  I bet you can.  The small viewfinder made it too challenging for me to focus manually.  I do a lot of manual focus work, not just panoramas, so this was a big deal for me.  There were other reasons as well, chief of which was that the Rebel’s high-ISO performance was giving me too much noise.  I do a lot of indoor, low-light shooting, so having better performance at higher ISOs would give me more latitude with those shots.  Did it work?  Just today I was notified that three of my images have been selected for an upcoming art show.

So going back to my question– yes, you should upgrade when you can articulate a clear set of reasons why your current body is holding you back, and why a new body will help you overcome those problems.  Making that list is really good discipline, since it helps you think through the issues and come to a decision.  You might find out that you don’t really need a new body after all, just a change in the way you use your current one.

Articulating your reasons for upgrading has a really nifty second benefit, too– it’s a perfect shopping list for your next camera.  If you know you need a camera with a larger, brighter viewfinder, you can narrow your focus to just cameras that fit that need.  If you need faster shooting, say because you do a lot of action sports shots, that’s a deciding factor.  If you need a camera that also cooks your dinner and whispers sweet nothings in your ear, well, go read science fiction.  Or invent one and get rich.

Oh, yes.  There’s one other “bad” reason for upgrading– I need more megapixels.  Unless you’re doing lots of printing at large sizes, you probably don’t need more megapixels.  More megapixels sounds cool, but in reality the bigger images can just be a hassle.  They take more space on your flash cards, more space on your computer’s hard drive, and are slower and more cumbersome to edit.  I say this with the conviction of someone who owns cameras of 8, 12, and 21 megapixels… and multiple terabytes of disk space.

So yes, you should buy a new camera if you understand exactly what problem a new camera will solve.  The one you should buy is the one that meets those expanded needs.

I hope this saves you money!  And thank you Erin for giving me the final nudge to write this article.

Next, I’ll talk about how to choose your first dSLR.