LITTLE BRAMPER
Contents
1. 12 7 means that the BULB time will decrease by 2 7 stops over 100 shots Collisions As Bulb increases it may eventually encroach upon the Interval duration this is referred to as a collision Little Bramper can predict when this is going to happen and will display an asterisk when a collision is going to occur within the next 100 shots Little Bramper will automatically increase Interval to accommodate the ever increasing Bulb exposures This is not always a graceful solution You can avoid this problem by either exploiting the concept of photographic reciprocity by using SO stepping or manually invoke Interval ramping X times for Bramping ISO stepping reciprocity a models If you increase the ISO by one stop e g 200 to 400 and decrease Bulb oa by one stop the exposure will be the same This is reciprocity Itis m RES useful when Bulb is getting too large and a collision with Interval is 40D 47ms imminent you can reduce Bulb whilst maintaining your current 350D 45ms exposure 300D 82ms Ensure X time is correctly set for your model of camera Prepare yourself for action you ll need to get this done within one shot cycle While camera is exposing a shot press D on Little Bramper to decrease Bulb by amount B step in stops As soon as camera has finished taking image quickly increase the camera s ISO setting by an amount equal to B step Bear in mind cameras only allow you to change ISO in multiples2. of 1 3 or 1 2 stops so set B step accordingly 5 Repeat the above as needed until you run out of ISO settings VN This also works with Neutral density filters If you use a 3 stop filter set B step to 3 0 Interval ramping lf you start with Intervals of say 6s to capture a nice sunset but know you ll need to end with longer intervals e g 20s to accommodate long exposures then you ll need to ramp the Interval Press 3 to increase Interval ramping 6 to decrease it Like bulb ramping it s measured in stops factors of two For example 11 0 means that the Interval will have doubled after 100 shots If you re mathematically minded you can compute the implications of interval ramping quite thoroughly See user manual As you Change the interval the passage of time in the final time lapse clip will accelerate decelerate This time warp effect may be desirable in itself Little Bramper as a regular intervalometer Even if you don t want to bramp Little Bramper can be used like a normal intervalometer but with the added benefit of arbitrary sub second intervals and interval ramping 1 Put the camera into any mode you like e g Av Tv M 2 Insert the terminator plug basically just a short circuit into Little Bramper s PC Hotshoe jack 3 Bulb is no longer relevant so set Bulb and Buffer to small values e g 10ms and 1ms this gives you access to very short sub second intervals c f Anatomy of a sh
3. LITTLE BRAMPER OVERVIEW Collision detection Bulb ramp f increasing Bulb remaining total 1 decreasing Interval remaining total Interval ramp Tincreasing decreasing Frames Tcount up endlessly Length of movie B step in stops clip secs 30fps or count down to zero GLOSSARY times in milliseconds 1s 1000ms INTERVAL time between start of one shot and start of next BULB the exposure time provided camera is in bulb mode FRAMES how many shots to take 0 infinity BUFFER time required to write image to card and display MENU SYSTEM image histogram Le ily te eee X TIME camera s minimum bulb exposure model specific To enter menu system press one of B STEP bulb will jump by this amount in stops for use with the keys that doesn t re a special ISO stepping and neutral density filters etc function e g 1 2 4 5 see SAVE you can save current settings as preset A B or C eet eas keypad diagram PRESETS 3 increase interval ramping THE KEYPAD 6 decrease interval ramping You can save your current settings as a preset by choosing option 7 Save in the menu You can have three presets A B and C A increase bulb ramping B decrease bulb ramping Preset A is automatically loaded upon power up reset HOLD B or C during power up reset to retrieve preset C increase bulb by bulb step D decrease bulb by bulb step HOLD D
4. Nikon AS 15 Sync Terminal Adapter on the hotshoe of a Canon 350D 3 5mm stereo Those buttons RESET Press this to reset device and load preset A If RESET you hold B C or D it will load that preset instead Emulate Shutter mostly for testing purposes If Bramper freezes or you want to test Bramper without a camera ome you ll need to emulate shutter activity by pressing this button Basic Bramping day to night 1 Ensure camera is set to First curtain sync usually the default or an option in the camera s menu system M G 2 Set BULB to a small value e g B 150ms Use aperture m filters to get desired exposure SmT2 S 614KB 3 Set BUFFER Must be long enough for camera to write 798 1288 image to card and display review image 1000ms or longer is typical Fast CF cards may reduce this value 4 Set INTERVAL Little Bramper will ensure that INTERVAL gt BULB BUFFER 5 Press to start time lapse Red LED will start blinking Press again will pause 6 When camera is exposing image green LED will be lit 7 Study review image and histograms on camera s LCD screen If image starts getting too dark increase the bulb ramping by pressing A If image starts getting too bright decrease the bulb ramping by pressing B The bulb ramping strength is expressed in stops per 100 shots For example 11 4 means that after 100 shots the BULB time will have increased by 1 4 stops and
5. during power up reset to retrieve most recent parameters emergency restart Presets save BULB INTERVAL BUFFER X TIME B STEP BULB RAMP INTERVAL RAMP EXIT or PAUSE THE ANATOMY OF A SHOT CYCLE 3 Buffer time writing displaying image Shutter lag waiting for shutter to open Fire Camera 2 Bulb exposure 4 Idle time waiting time for next shot pA Interval A shot cycle starts with firing the camera Little Bramper waits for the shutter to open stage 1 this delay is the shutter lag and is of little interest Once the shutter curtains have opened Little Bramper starts timing the Bulb exposure stage 2 When the exposure is complete Little Bramper releases the camera which then writes the image to the CF card and displays it on its LCD this occurs within the Buffer time stage 3 Finally we wait until the interval has elapsed stage 4 and we start the cycle over again Note that INTERVAL gt BULB BUFFER Shutter lag Fire Camera CONNECTING LITTLE BRAMPER TO YOUR CAMERA 1 Connect jack on Little Bramper labeled BULB to the remote socket of your camera 2 Little Bramper monitors shutter activity via the camera s PC Prontor Compur socket Most mid to high end bodies have one labeled with a flash symbol If your camera lacks a PC socket e g entry level bodies like Canon 300D 350D you can get a Hotshoe PC adapter Shown is the
6. ot diagram 4 If you often shoot short interval time lapse consider setting this as a preset Troubleshooting Little Bramper is a 5volt system It was designed to be used with 4 NIMH AA cells 4x1 2v 4 8v DO NOT USE 1 5v ALKALINE CELLS lf LCD is black or blank upon start up try fiddling with the LCD contrast knob lf Little Bramper still misbehaves check nothing is causing a short circuit on bottom of circuit board e g metal surface moisture etc hint Little Bramper fits Pelican 1020 and 1040 cases lf camera fires but exposure doesn t end check your PC Prontor Compur connection Shooting very short intervals and the camera stops and or Little Bramper shows ridiculous numbers It means you re driving your camera beyond its capabilities Stop doing that If you want 0 6s intervals then use a speedy camera and fast CF cards After each shot Little Bramper computes the next shot and saves these parameter values as preset D If something catastrophic happens e g batteries die cable is disconnected or you accidentally change parameter values do the following 1 Pause Little Bramper press 2 Address any hardware problems 3 Restart Little Bramper whilst holding down D This retrieves the parameters of the last photograph taken enabling you to possibly rescue the time lapse
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