diff --git a/mainwindow.cpp b/mainwindow.cpp
index 5308262..c24a0bc 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -12,6 +12,7 @@
 #include <QDockWidget>
 #include <signal.h>
 #include <unistd.h>
+#include "photocapture.h"
 
 #ifdef __linux__
 #include <sys/ioctl.h>
@@ -35,6 +36,11 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent),
     setCentralWidget(m_image);
     resize(800, 600);
 
+    PhotoCapture *photoCapture = new PhotoCapture(this);
+    QDockWidget *captureDock = new QDockWidget(tr("Photo capture"), this);
+    captureDock->setWidget(photoCapture);
+    addDockWidget(Qt::BottomDockWidgetArea, captureDock);
+
     setWindowTitle(tr("Tenmon"));
 
     m_ringList = new ImageRingList(this);
diff --git a/phd.cpp b/phd.cpp
new file mode 100644
index 0000000..d28ffe2
--- /dev/null
+++ b/phd.cpp
@@ -0,0 +1,93 @@
+#include "phd.h"
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonArray>
+
+const QHash<PHDState, QString> stateMap = {{Stopped, "Stopped"}, {Selected,"Selected"}, {Calibrating,"Calibrating"}, {Guiding,"Guiding"},
+                                            {LostLock,"LostLock"}, {Paused,"Paused"}, {Looping,"Looping"}};
+
+PHD::PHD(QObject *parent) : QObject(parent)
+  ,_messageId(0)
+{
+    _socket = new QTcpSocket(this);
+    connect(_socket, SIGNAL(readyRead()), this, SLOT(readyRead()));
+}
+
+void PHD::connectTo(const QHostAddress &address, int port)
+{
+    if(_socket->state() == QTcpSocket::ConnectedState)
+    {
+        _socket->disconnect();
+        _socket->waitForDisconnected();
+    }
+    _socket->connectToHost(address, port);
+}
+
+QString PHD::stateToString(PHDState state)
+{
+    if(stateMap.contains(state))
+        return stateMap[state];
+    else
+        return QString();
+}
+
+PHDState PHD::stringToState(const QString &state)
+{
+    return stateMap.key(state, Unknown);
+}
+
+void PHD::dither(float pixels, bool raOnly, int time, int timeout)
+{
+    QVariantList params;
+    params.append(pixels);
+    params.append(raOnly);
+    params.append(QVariantHash({{"pixels",pixels/2.0},{"time",time},{"timeout",timeout}}));
+    invokeMethod("dither", params);
+}
+
+void PHD::parseMessage()
+{
+    QJsonDocument json = QJsonDocument::fromJson(_data);
+    QJsonObject message = json.object();
+    //qDebug() << message;
+    if(message.contains("Event"))
+    {
+        QString event = message.value("Event").toString();
+        if(event=="AppState")
+            emit stateChanged(stringToState(message.value("State").toString()));
+        else if(event=="SettleDone")
+        {
+            qDebug() << message;
+            emit settled();
+        }
+    }
+
+    _data.clear();
+}
+
+void PHD::invokeMethod(const QString &method, const QVariantList &params)
+{
+    QJsonDocument json;
+    QJsonObject message;
+    message.insert("method", method);
+    message.insert("id", QString::number(_messageId++));
+    message.insert("params", QJsonArray::fromVariantList(params));
+    json.setObject(message);
+    QByteArray data = json.toJson(QJsonDocument::Compact);
+    data.append('\n');
+    _socket->write(data);
+}
+
+void PHD::readyRead()
+{
+    QByteArray data = _socket->readAll();
+    int index;
+    while((index = data.indexOf('\n')) != -1)
+    {
+        _data.append(data.left(index));
+        data.remove(0, index+1);
+        parseMessage();
+    }
+    if(data.size())
+        _data.append(data);
+}
diff --git a/phd.h b/phd.h
new file mode 100644
index 0000000..b5bfa1f
--- /dev/null
+++ b/phd.h
@@ -0,0 +1,42 @@
+#ifndef PHD_H
+#define PHD_H
+
+#include <QObject>
+#include <QTcpSocket>
+
+typedef enum
+{
+    Stopped,
+    Selected,
+    Calibrating,
+    Guiding,
+    LostLock,
+    Paused,
+    Looping,
+    Unknown,
+}PHDState;
+
+class PHD : public QObject
+{
+    Q_OBJECT
+    QTcpSocket *_socket;
+    QByteArray _data;
+    int _messageId;
+public:
+    explicit PHD(QObject *parent = nullptr);
+    void connectTo(const QHostAddress &address, int port = 4400);
+    QString stateToString(PHDState state);
+    PHDState stringToState(const QString &state);
+    void dither(float pixels, bool raOnly, int time = 5, int timeout = 30);
+private:
+    void parseMessage();
+    void invokeMethod(const QString &method, const QVariantList &params);
+private slots:
+    void readyRead();
+signals:
+    void connected();
+    void settled();
+    void stateChanged(PHDState state);
+};
+
+#endif // PHD_H
diff --git a/photocapture.cpp b/photocapture.cpp
new file mode 100644
index 0000000..ff7c8f9
--- /dev/null
+++ b/photocapture.cpp
@@ -0,0 +1,142 @@
+#include "photocapture.h"
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QFileDialog>
+#include <QStandardPaths>
+#include <QDateTime>
+#include <QDebug>
+#include <QTimer>
+#include <QHostAddress>
+
+PhotoCapture::PhotoCapture(QWidget *parent) : QWidget(parent)
+{
+    QHBoxLayout *layout = new QHBoxLayout(this);
+    setLayout(layout);
+
+    layout->addWidget(new QLabel(tr("Exposure time"), this));
+    _exposureTime = new QSpinBox(this);
+    _exposureTime->setValue(60);
+    _exposureTime->setSingleStep(60);
+    _exposureTime->setRange(0, 3600);
+    _exposureTime->setSuffix("s");
+    layout->addWidget(_exposureTime);
+
+    layout->addWidget(new QLabel(tr("Count"), this));
+    _numberOfExposures = new QSpinBox(this);
+    _numberOfExposures->setValue(1);
+    layout->addWidget(_numberOfExposures);
+
+    layout->addWidget(new QLabel(tr("Dither frequency"), this));
+    _ditherFreq = new QSpinBox(this);
+    _ditherFreq->setValue(1);
+    _ditherFreq->setRange(0, 10);
+    layout->addWidget(_ditherFreq);
+
+    _startCapture = new QPushButton(tr("Start capture"), this);
+    connect(_startCapture, SIGNAL(clicked()), this, SLOT(startCaputre()));
+    layout->addWidget(_startCapture);
+
+    QPushButton *selectDirButton = new QPushButton(tr("Select output"), this);
+    layout->addWidget(selectDirButton);
+    connect(selectDirButton, SIGNAL(clicked()), this, SLOT(selectDir()));
+
+    _process = new QProcess(this);
+    _process->setProgram("gphoto2");
+    connect(_process, SIGNAL(finished(int)), this, SLOT(processFinished(int)));
+    connect(_process, SIGNAL(readyReadStandardOutput()), this, SLOT(readStdout()));
+    connect(_process, SIGNAL(readyReadStandardError()), this, SLOT(readStderr()));
+
+    QStringList paths = QStandardPaths::standardLocations(QStandardPaths::PicturesLocation);
+    if(paths.size())
+        _outputDir.setPath(paths.first()+"/astro");
+
+    _timer = new QTimer(this);
+    _timer->setInterval(1000);
+    _timer->setSingleShot(true);
+    connect(_timer, SIGNAL(timeout()), this, SLOT(startCaputre()));
+
+    _phd = new PHD(this);
+    _phd->connectTo(QHostAddress("127.0.0.1"));
+    connect(_phd, SIGNAL(settled()), this, SLOT(startCaputre()));
+
+    _photoCount = 0;
+}
+
+PhotoCapture::~PhotoCapture()
+{
+    if(_process->state()==QProcess::Running)
+    {
+        _process->terminate();
+        _process->waitForFinished(5000);
+    }
+}
+
+void PhotoCapture::startCaputre()
+{
+    if(_process->state()==QProcess::Running)
+    {
+        _process->terminate();
+        _process->waitForFinished(10000);
+        _startCapture->setText(tr("Start capture"));
+        _numberOfExposures->setValue(0);
+        _photoCount = 0;
+    }
+    else if(_numberOfExposures->value()>0)
+    {
+        _photoCount++;
+        _startCapture->setText(tr("Stop capture"));
+        QString file = "capt"+QDateTime::currentDateTime().toString(Qt::ISODate)+".cr2";
+        QString path = _outputDir.absoluteFilePath(file);
+
+        QStringList args = {"--force-overwrite", "--set-config",  "eosremoterelease=5",
+                            QString("--wait-event=%1s").arg(_exposureTime->value()),
+                            "--set-config", "eosremoterelease=9",
+                            "--wait-event-and-download=3s",
+                            QString("--filename=%1").arg(path)};
+        _process->setArguments(args);
+        _process->start();
+    }
+    else
+    {
+        _photoCount = 0;
+        _startCapture->setText(tr("Start capture"));
+    }
+}
+
+void PhotoCapture::processFinished(int exit)
+{
+    if(exit==0)
+    {
+        _numberOfExposures->setValue(_numberOfExposures->value()-1);
+        if(_ditherFreq->value() == _photoCount)
+        {
+            _photoCount = 0;
+            _phd->dither(4, false);
+        }
+        else
+        {
+            _timer->start();
+        }
+    }
+    else
+    {
+        qDebug() << "gphoto failed" << exit;
+        _startCapture->setText(tr("Start capture"));
+    }
+}
+
+void PhotoCapture::selectDir()
+{
+    QString path = QFileDialog::getExistingDirectory(this, tr("Output directory"), _outputDir.absolutePath());
+    _outputDir.setPath(path);
+}
+
+void PhotoCapture::readStdout()
+{
+    //qDebug() << _process->readAllStandardOutput();
+}
+
+void PhotoCapture::readStderr()
+{
+    //qDebug() << _process->readAllStandardError();
+}
diff --git a/photocapture.h b/photocapture.h
new file mode 100644
index 0000000..fb8f427
--- /dev/null
+++ b/photocapture.h
@@ -0,0 +1,37 @@
+#ifndef PHOTOCAPTURE_H
+#define PHOTOCAPTURE_H
+
+#include <QWidget>
+#include <QSpinBox>
+#include <QPushButton>
+#include <QProcess>
+#include <QDir>
+#include "phd.h"
+
+class PhotoCapture : public QWidget
+{
+    Q_OBJECT
+    QSpinBox *_exposureTime;
+    QSpinBox *_numberOfExposures;
+    QSpinBox *_ditherFreq;
+    QPushButton *_startCapture;
+    QProcess *_process;
+    QDir _outputDir;
+    QTimer *_timer;
+    PHD *_phd;
+    int _photoCount;
+public:
+    explicit PhotoCapture(QWidget *parent = nullptr);
+    ~PhotoCapture();
+signals:
+
+public slots:
+    void startCaputre();
+private slots:
+    void processFinished(int exit);
+    void selectDir();
+    void readStdout();
+    void readStderr();
+};
+
+#endif // PHOTOCAPTURE_H
diff --git a/tenmon.pro b/tenmon.pro
index c2b28a7..6ae294e 100644
--- a/tenmon.pro
+++ b/tenmon.pro
@@ -4,7 +4,7 @@
 #
 #-------------------------------------------------
 
-QT       += core gui sql
+QT       += core gui sql network
 
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
@@ -27,7 +27,9 @@ SOURCES += main.cpp\
     database.cpp \
     loadrunable.cpp \
     imageinfo.cpp \
-    starfit.cpp
+    starfit.cpp \
+    phd.cpp \
+    photocapture.cpp
 
 HEADERS  += mainwindow.h \
     imagescrollarea.h \
@@ -36,4 +38,6 @@ HEADERS  += mainwindow.h \
     loadrunable.h \
     imageinfo.h \
     rawimage.h \
-    starfit.h
+    starfit.h \
+    phd.h \
+    photocapture.h